Cobalt Blue#030AA7

#030AA7 is a dark, highly saturated blue. Relative luminance 0.030; OKLCH L 33.6% C 0.223 H 264.6°. Best body text is #FFFFFF at 13.08:1 contrast (WCAG AA passes).

Cobalt Blue — editorial page

Color values

HEX	#030AA7
RGB	rgb(3, 10, 167)
HSL	hsl(237, 96%, 33%)
HSV	hsv(237, 98%, 65%)
CMYK	cmyk(98.2%, 94%, 0%, 34.5%)
CIE-LAB	lab(20.15, 54.96, -76.94)
CIE-LCH	lch(20.15, 94.56, 305.54°)
OKLab	oklab(33.6% -0.0208 -0.2225)
OKLCH	oklch(33.6% 0.223 264.6)
XYZ	xyz(7.1187, 3.0255, 36.7605)
Luminance	0.0303 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#030AA7 #A7A003

analogous

#035CA7 #030AA7 #4E03A7

triadic

#030AA7 #A7030A #0AA703

tetradic

#030AA7 #A7035C #A7A003 #03A74E

square

#030AA7 #A7035C #A7A003 #03A74E

split-complementary

#030AA7 #A74E03 #5CA703

monochromatic

#01032F #02066B #030AA7 #040EE3 #2932FB

Accessibility & contrast

On white

13.08

#030AA7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#030AA7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #030AA7

13.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##030AA7	#FFFFFF	#000000	##FFFFFF
##030AA7	1.00	13.08	1.61	13.08
#FFFFFF	13.08	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0039AB

Deuteranopia (green-blind)

#0027A5

Tritanopia (blue-blind)

#004561

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #030aa7;
/* rgb */ color: rgb(3, 10, 167);
/* oklch */ color: oklch(33.6% 0.223 264.6);

Tailwind

colors: {
  custom: {
    50: '#7354c3',
    500: '#030aa7',
    950: '#000000',
  },
}

SCSS

$custom: #030aa7;
$custom-light: #7354c3;
$custom-dark: #000000;

JSON

{
  "hex": "#030aa7",
  "rgb": {
    "r": 3,
    "g": 10,
    "b": 167
  },
  "hsl": {
    "h": 237.439,
    "s": 96.471,
    "l": 33.333
  },
  "oklch": {
    "l": 0.33599,
    "c": 0.22347,
    "h": 264.6
  },
  "luminance": 0.03026
}

Semantic roles & 50–950 ramp

primary

#030AA7

secondary

#D7D02F

accent

#F629FF

background

#F7F5FC

surface

#EEE9F8

border

#C9C5D1

text

#0A0313

muted

#7C7882

Preview Lab

Preview with #030AA7

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

Preview Lab → · Contrast checker → · Palette generator →