#6591EF#6591EF

#6591EF is a light, vivid blue. Relative luminance 0.292; OKLCH L 66.8% C 0.148 H 263.9°. Best body text is #000000 at 6.85:1 contrast (WCAG AA passes).

Color values

HEX	#6591EF
RGB	rgb(101, 145, 239)
HSL	hsl(221, 81%, 67%)
HSV	hsv(221, 58%, 94%)
CMYK	cmyk(57.7%, 39.3%, 0%, 6.3%)
CIE-LAB	lab(61.00, 12.53, -51.87)
CIE-LCH	lch(61.00, 53.36, 283.58°)
OKLab	oklab(66.79% -0.0157 -0.1473)
OKLCH	oklch(66.79% 0.148 263.9)
XYZ	xyz(31.0669, 29.2469, 85.6527)
Luminance	0.2925 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6591EF #EFC365

analogous

#65D6EF #6591EF #7E65EF

triadic

#6591EF #EF6591 #91EF65

tetradic

#6591EF #EF65D6 #EFC365 #65EF7E

square

#6591EF #EF65D6 #EFC365 #65EF7E

split-complementary

#6591EF #EF7E65 #D6EF65

monochromatic

#144DC5 #2E69E9 #6591EF #9CB9F5 #D4E0FB

Accessibility & contrast

On white

3.07

#6591EF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.85

#6591EF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6591EF

6.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6591EF	#FFFFFF	#000000	##000000
##6591EF	1.00	3.07	6.85	6.85
#FFFFFF	3.07	1.00	21.00	21.00
#000000	6.85	21.00	1.00	1.00
##000000	6.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#699AF3

Deuteranopia (green-blind)

#578DED

Tritanopia (blue-blind)

#00A6B4

Achromatopsia (no color)

#939393

Design tokens & code

CSS

--color: #6591ef;
/* rgb */ color: rgb(101, 145, 239);
/* oklch */ color: oklch(66.8% 0.148 263.9);

Tailwind

colors: {
  custom: {
    50: '#9bb0f5',
    500: '#6591ef',
    950: '#000000',
  },
}

SCSS

$custom: #6591ef;
$custom-light: #9bb0f5;
$custom-dark: #000000;

JSON

{
  "hex": "#6591ef",
  "rgb": {
    "r": 101,
    "g": 145,
    "b": 239
  },
  "hsl": {
    "h": 220.87,
    "s": 81.176,
    "l": 66.667
  },
  "oklch": {
    "l": 0.66791,
    "c": 0.14813,
    "h": 263.9
  },
  "luminance": 0.29249
}

Semantic roles & 50–950 ramp

primary

#6591EF

secondary

#EEE0C2

accent

#9908DE

background

#FAFAFF

surface

#F3F4FE

border

#CDCED6

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #6591EF

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

Preview Lab → · Contrast checker → · Palette generator →