#437DDD#437DDD

#437DDD is a mid, vivid blue. Relative luminance 0.211; OKLCH L 59.9% C 0.159 H 259.9°. Best body text is #000000 at 5.22:1 contrast (WCAG AA passes).

Color values

HEX	#437DDD
RGB	rgb(67, 125, 221)
HSL	hsl(217, 69%, 56%)
HSV	hsv(217, 70%, 87%)
CMYK	cmyk(69.7%, 43.4%, 0%, 13.3%)
CIE-LAB	lab(53.04, 12.63, -54.62)
CIE-LCH	lch(53.04, 56.06, 283.02°)
OKLab	oklab(59.9% -0.0278 -0.1562)
OKLCH	oklch(59.9% 0.159 259.9)
XYZ	xyz(22.6948, 21.0786, 71.2651)
Luminance	0.2108 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#437DDD #DDA343

analogous

#43CADD #437DDD #5643DD

triadic

#437DDD #DD437D #7DDD43

tetradic

#437DDD #DD43CA #DDA343 #43DD56

square

#437DDD #DD43CA #DDA343 #43DD56

split-complementary

#437DDD #DD5643 #CADD43

monochromatic

#19458C #235EC0 #437DDD #77A1E6 #ABC5F0

Accessibility & contrast

On white

4.03

#437DDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.22

#437DDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #437DDD

5.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##437DDD	#FFFFFF	#000000	##000000
##437DDD	1.00	4.03	5.22	5.22
#FFFFFF	4.03	1.00	21.00	21.00
#000000	5.22	21.00	1.00	1.00
##000000	5.22	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E86E1

Deuteranopia (green-blind)

#3278DB

Tritanopia (blue-blind)

#0093A2

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #437ddd;
/* rgb */ color: rgb(67, 125, 221);
/* oklch */ color: oklch(59.9% 0.159 259.9);

Tailwind

colors: {
  custom: {
    50: '#88a2e8',
    500: '#437ddd',
    950: '#000000',
  },
}

SCSS

$custom: #437ddd;
$custom-light: #88a2e8;
$custom-dark: #000000;

JSON

{
  "hex": "#437ddd",
  "rgb": {
    "r": 67,
    "g": 125,
    "b": 221
  },
  "hsl": {
    "h": 217.403,
    "s": 69.369,
    "l": 56.471
  },
  "oklch": {
    "l": 0.59903,
    "c": 0.15865,
    "h": 259.9
  },
  "luminance": 0.21081
}

Semantic roles & 50–950 ramp

primary

#437DDD

secondary

#DEC69E

accent

#AA3CEC

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0F16

muted

#7E7E84

Preview Lab

Preview with #437DDD

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

Preview Lab → · Contrast checker → · Palette generator →