#233F7B#233F7B

#233F7B is a dark, moderate blue. Relative luminance 0.053; OKLCH L 38.0% C 0.108 H 263.4°. Best body text is #FFFFFF at 10.15:1 contrast (WCAG AA passes).

Color values

HEX	#233F7B
RGB	rgb(35, 63, 123)
HSL	hsl(221, 56%, 31%)
HSV	hsv(221, 72%, 48%)
CMYK	cmyk(71.5%, 48.8%, 0%, 51.8%)
CIE-LAB	lab(27.69, 11.27, -37.31)
CIE-LCH	lch(27.69, 38.98, 286.81°)
OKLab	oklab(38.04% -0.0124 -0.1069)
OKLCH	oklch(38.04% 0.108 263.4)
XYZ	xyz(6.0445, 5.3418, 19.4476)
Luminance	0.0534 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233F7B #7B5F23

analogous

#236B7B #233F7B #33237B

triadic

#233F7B #7B233F #3F7B23

tetradic

#233F7B #7B236B #7B5F23 #237B33

square

#233F7B #7B236B #7B5F23 #237B33

split-complementary

#233F7B #7B3323 #6B7B23

monochromatic

#080E1C #15274B #233F7B #3157AB #4C75CC

Accessibility & contrast

On white

10.15

#233F7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#233F7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233F7B

10.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233F7B	#FFFFFF	#000000	##FFFFFF
##233F7B	1.00	10.15	2.07	10.15
#FFFFFF	10.15	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#20467D

Deuteranopia (green-blind)

#0C3E7A

Tritanopia (blue-blind)

#004D57

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #233f7b;
/* rgb */ color: rgb(35, 63, 123);
/* oklch */ color: oklch(38.0% 0.108 263.4);

Tailwind

colors: {
  custom: {
    50: '#6973a2',
    500: '#233f7b',
    950: '#000000',
  },
}

SCSS

$custom: #233f7b;
$custom-light: #6973a2;
$custom-dark: #000000;

JSON

{
  "hex": "#233f7b",
  "rgb": {
    "r": 35,
    "g": 63,
    "b": 123
  },
  "hsl": {
    "h": 220.909,
    "s": 55.696,
    "l": 30.98
  },
  "oklch": {
    "l": 0.38043,
    "c": 0.1076,
    "h": 263.4
  },
  "luminance": 0.05342
}

Semantic roles & 50–950 ramp

primary

#233F7B

secondary

#AE8F4C

accent

#AF49DF

background

#F6F6FA

surface

#ECECF3

border

#C7C7CD

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #233F7B

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →