#437BCB#437BCB

#437BCB is a mid, vivid blue. Relative luminance 0.197; OKLCH L 58.4% C 0.137 H 257.5°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#437BCB
RGB	rgb(67, 123, 203)
HSL	hsl(215, 57%, 53%)
HSV	hsv(215, 67%, 80%)
CMYK	cmyk(67%, 39.4%, 0%, 20.4%)
CIE-LAB	lab(51.46, 7.47, -46.94)
CIE-LCH	lch(51.46, 47.54, 279.04°)
OKLab	oklab(58.36% -0.0295 -0.1337)
OKLCH	oklch(58.36% 0.137 257.5)
XYZ	xyz(20.1733, 19.6690, 59.2217)
Luminance	0.1967 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#437BCB #CB9343

analogous

#43BFCB #437BCB #4F43CB

triadic

#437BCB #CB437B #7BCB43

tetradic

#437BCB #CB43BF #CB9343 #43CB4F

square

#437BCB #CB43BF #CB9343 #43CB4F

split-complementary

#437BCB #CB4F43 #BFCB43

monochromatic

#204274 #2D5EA4 #437BCB #739DD8 #A3BEE6

Accessibility & contrast

On white

4.26

#437BCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#437BCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #437BCB

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##437BCB	#FFFFFF	#000000	##000000
##437BCB	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5782CE

Deuteranopia (green-blind)

#4275C9

Tritanopia (blue-blind)

#008D99

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #437bcb;
/* rgb */ color: rgb(67, 123, 203);
/* oklch */ color: oklch(58.4% 0.137 257.5);

Tailwind

colors: {
  custom: {
    50: '#85a0db',
    500: '#437bcb',
    950: '#000000',
  },
}

SCSS

$custom: #437bcb;
$custom-light: #85a0db;
$custom-dark: #000000;

JSON

{
  "hex": "#437bcb",
  "rgb": {
    "r": 67,
    "g": 123,
    "b": 203
  },
  "hsl": {
    "h": 215.294,
    "s": 56.667,
    "l": 52.941
  },
  "oklch": {
    "l": 0.58355,
    "c": 0.13691,
    "h": 257.5
  },
  "luminance": 0.19671
}

Semantic roles & 50–950 ramp

primary

#437BCB

secondary

#D2BA98

accent

#A148E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #437BCB

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

Preview Lab → · Contrast checker → · Palette generator →