Slate blue color: hex codes, shades and palettes

Palettes built around slate blue. Click any swatch to copy its hex code.

A muted blue-grey named after the stone. Note that CSS also has a keyword `slateblue`, which is a much more saturated violet. They are not the same colour.

Slate blue hex, RGB, HSL and OKLCH

#5B6F8C

HEX: #5B6F8C
RGB: rgb(91, 111, 140)
HSL: hsl(216, 21%, 45%)
OKLCH: oklch(53.7% 0.052 257.6)
On white: 5.13:1
On black: 4.10:1

Shades of slate blue

9 steps from one base color, generated in OKLCH so each step is an equal perceived step rather than an equal numeric one. Click a swatch to copy it.

Slate blue color values

#5B6F8Crgb(91, 111, 140)

Color spaces of #5b6f8c
RGB	91	111	140
HSL	216°	21%	45%
HSV	216°	35%	55%
CMYK	0.35	0.21	0.00	0.45
XYZ	14.7310	15.4858	27.0187
Yxy	15.4858	0.2574	0.2706
CIE-Lab	46.2925	0.0742	-18.2787
Hunter Lab	39.3520	-2.0465	-13.1615
OKLCH	53.7%	0.052	257.6°

#5B6F8C is 91 red, 111 green and 140 blue. Its blue channel carries the most of it. The nearest of the 216 web safe colors is #666699.

CIE-Lab, XYZ and Yxy are measured against D65, the white point sRGB itself is defined against. Hunter Lab uses the original illuminant C constants, which is what paint and plastics specifications quote, so the two Lab rows are not directly comparable. CMYK is the plain arithmetic conversion: real ink values depend on the press, the paper and the profile.

Base numbers
Base	Red	Green	Blue
Binary	01011011	01101111	10001100
Octal	133	157	214
Decimal	91	111	140
Hex	5B	6F	8C

#5b6f8c mixed with black

Ten even steps of the classic shade ramp, worked out in RGB, which is how the term has always been defined and how other references list it. The OKLCH scale further down this page answers a different question: it steps by equal perceived amounts, so its values are not the same.

#5B6F8C
#51637E
#485870
#3F4D62
#364254
#2D3746
#242C38
#1B212A
#12161B
#090B0D
#000000

#5b6f8c mixed with white

The tint ramp, by the same rule in the other direction.

#5B6F8C
#6B7D97
#7B8BA3
#8C9AAE
#9CA8BA
#ADB7C5
#BDC5D1
#CDD3DC
#DEE2E8
#EEF0F3
#FFFFFF

Channel shares

Red26.6%
Green32.5%
Blue40.9%

Color schemes

Turned in OKLCH rather than HSL, so every member keeps the lightness and chroma of the original instead of one of them arriving washed out.

Complementary

#5B6F8C
#7F6A4B

Triadic

#5B6F8C
#896263
#5F7558

Analogous

#5B6F8C
#6C698B
#4D7485

Monochromatic

#031027
#1C2D47
#3A4D68
#5B6F8C
#7E93B1
#A2B8D8
#C9DFFF

#5b6f8c on black and on white

The quick brown fox jumps over the lazy dog. 4.10:1

The quick brown fox jumps over the lazy dog. 5.13:1

Body text needs 4.5:1 to meet AA and large text needs 3:1, so a ratio tells you which of the two backgrounds this color can be read on, and at what size.

CSS for #5b6f8c

color: #5b6f8c;
background-color: #5b6f8c;
border: 3px solid #5b6f8c;
box-shadow: 1px 1px 3px 2px #5b6f8c;
text-shadow: 4px 4px 2px rgba(91, 111, 140, 0.8);

/* Perceptually even, and what a modern stylesheet wants */
color: oklch(53.7% 0.052 257.6);

The OKLCH form is the same color stated so that lightening or darkening it moves by an amount the eye agrees with. Every current browser understands it.

Contrast and readability

Slate blue on white measures 5.13:1 and on black 4.10:1. WCAG AA asks for 4.5:1 on normal text and 3:1 on large text and UI components, so the higher of those two decides which background it belongs on. In the scale above, 500 is the first to clear 4.5:1 on white, at 5.27:1.

The contrast checker reports every level for a given pair and suggests the nearest passing shade on the same hue. The color picker builds this same scale from any color you paste in.

Related colors: blue, navy, royal blue, cobalt, periwinkle, transparent blue. See every shade on the colors index.

#B9DBCA

#69958F

#618B94

#698A9F

#D7988D

#FFAD90

#57C2E3

#56A3CD

#DCB0CA

#CC9D6B

#405F4F

#83ABE6

#151C26

#182D47

#243E61

#3D5169

#34BDF5

#E07EA6

#ACB200

#3D93D8

#967535

#544A29

#896335

#557EB1

#CAB4A1

#8E7B59

#65979F

#8386AD

#DAE7FF

#B8D1F2

#A6B9D5

#7FA4D5

#F0A358

#CE9A43

#5BA3CC

#63A3DC

#00B0BB

#9AD0E6

#97B5D3

#7E96D1

#CDE5ED

#B9CFDB

#9CCBF2

#B6CBEB

#BFDCE6

#BED5E8

#CED7E9

#CDCAE2

#D3CDE2

#DAD4E9

#DFDBF2

#E7E1FD

#79C5F3

#9EC1E6

#314B8E

#979DFF

#FF9FBB

#F3A400

#28DEBB

#8895E4

#6EACBA

#869CA9

#90ABCF

#6F74A1

#FF9172

#8FF6CA

#A2BAFF

#FF975C

#B4E2B0

#B0D0FB

#FFD5CD

#ABE3CD

#A1CEDA

#7F99AD

#C3D3F7

#D7D3EE

#859FD6

#D1C7F7

#9E8CA8

#AD8A9E

#8EC7DA

#9ABCDA

#A7B4D4

#9A8CD0

#F7A669

#67C692

#74CBFF

#DD9BFD

#FFD6DD

#AFC693

#8AC2F2

#FAA3A4

#B48755

#B68E3C

#00AEC0

#625EA1