#ECF05B#ECF05B

#ECF05B is a very light, vivid yellow. Relative luminance 0.809; OKLCH L 92.5% C 0.168 H 110.7°. Best body text is #000000 at 17.18:1 contrast (WCAG AA passes).

Color values

HEX	#ECF05B
RGB	rgb(236, 240, 91)
HSL	hsl(62, 83%, 65%)
HSV	hsv(62, 62%, 94%)
CMYK	cmyk(1.7%, 0%, 62.1%, 5.9%)
CIE-LAB	lab(92.09, -19.51, 69.10)
CIE-LCH	lch(92.09, 71.80, 105.76°)
OKLab	oklab(92.51% -0.0594 0.1569)
OKLCH	oklch(92.51% 0.168 110.7)
XYZ	xyz(67.6425, 80.9101, 21.9495)
Luminance	0.8091 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF05B #5F5BF0

analogous

#F0AA5B #ECF05B #A1F05B

triadic

#ECF05B #5BECF0 #F05BEC

tetradic

#ECF05B #5BF0AA #5F5BF0 #F05BA1

square

#ECF05B #5BF0AA #5F5BF0 #F05BA1

split-complementary

#ECF05B #5BA1F0 #AA5BF0

monochromatic

#BABF11 #E6EB23 #ECF05B #F2F593 #F9FACB

Accessibility & contrast

On white

1.22

#ECF05B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.18

#ECF05B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF05B

17.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF05B	#FFFFFF	#000000	##000000
##ECF05B	1.00	1.22	17.18	17.18
#FFFFFF	1.22	1.00	21.00	21.00
#000000	17.18	21.00	1.00	1.00
##000000	17.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE648

Deuteranopia (green-blind)

#FFEA65

Tritanopia (blue-blind)

#FBE2D1

Achromatopsia (no color)

#E8E8E8

Design tokens & code

CSS

--color: #ecf05b;
/* rgb */ color: rgb(236, 240, 91);
/* oklch */ color: oklch(92.5% 0.168 110.7);

Tailwind

colors: {
  custom: {
    50: '#f5f490',
    500: '#ecf05b',
    950: '#000000',
  },
}

SCSS

$custom: #ecf05b;
$custom-light: #f5f490;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf05b",
  "rgb": {
    "r": 236,
    "g": 240,
    "b": 91
  },
  "hsl": {
    "h": 61.611,
    "s": 83.24,
    "l": 64.902
  },
  "oklch": {
    "l": 0.9251,
    "c": 0.16778,
    "h": 110.7
  },
  "luminance": 0.80908
}

Semantic roles & 50–950 ramp

primary

#ECF05B

secondary

#3632BD

accent

#06E00C

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#17170D

muted

#85857F

Preview Lab

Preview with #ECF05B

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

Preview Lab → · Contrast checker → · Palette generator →