#233FBC#233FBC

#233FBC is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.7% C 0.198 H 267.1°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#233FBC
RGB	rgb(35, 63, 188)
HSL	hsl(229, 69%, 44%)
HSV	hsv(229, 81%, 74%)
CMYK	cmyk(81.4%, 66.5%, 0%, 26.3%)
CIE-LAB	lab(33.01, 36.37, -68.15)
CIE-LCH	lch(33.01, 77.25, 298.09°)
OKLab	oklab(43.68% -0.0099 -0.1974)
OKLCH	oklch(43.68% 0.198 267.1)
XYZ	xyz(11.5446, 7.5418, 48.4145)
Luminance	0.0754 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.03

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233FBC #BCA023

analogous

#238BBC #233FBC #5423BC

triadic

#233FBC #BC233F #3FBC23

tetradic

#233FBC #BC238B #BCA023 #23BC54

square

#233FBC #BC238B #BCA023 #23BC54

split-complementary

#233FBC #BC5423 #8BBC23

monochromatic

#101C55 #192E88 #233FBC #415DDC #7489E5

Accessibility & contrast

On white

8.37

#233FBC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#233FBC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233FBC

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233FBC	#FFFFFF	#000000	##FFFFFF
##233FBC	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055C0

Deuteranopia (green-blind)

#0046BA

Tritanopia (blue-blind)

#006178

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #233fbc;
/* rgb */ color: rgb(35, 63, 188);
/* oklch */ color: oklch(43.7% 0.198 267.1);

Tailwind

colors: {
  custom: {
    50: '#7974d1',
    500: '#233fbc',
    950: '#000000',
  },
}

SCSS

$custom: #233fbc;
$custom-light: #7974d1;
$custom-dark: #000000;

JSON

{
  "hex": "#233fbc",
  "rgb": {
    "r": 35,
    "g": 63,
    "b": 188
  },
  "hsl": {
    "h": 229.02,
    "s": 68.61,
    "l": 43.725
  },
  "oklch": {
    "l": 0.43682,
    "c": 0.19765,
    "h": 267.1
  },
  "luminance": 0.07543
}

Semantic roles & 50–950 ramp

primary

#233FBC

secondary

#CCBB6F

accent

#CB3CEB

background

#F8F7FD

surface

#EFEDFA

border

#CAC8D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #233FBC

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

Preview Lab → · Contrast checker → · Palette generator →