#EFCC51
Closest named color: Maize (#F4D054). oklch(85.3% 0.144 93.1), rgb(239, 204, 81).
Aa
Black text reads best on this color (13.42:1).
About this color
#EFCC51 is a light, vivid yellow. In OKLCH its lightness is 85%, its chroma 0.144 and its hue 93°. Its hue sits on the warm side of the wheel. The nearest named color is Maize (#F4D054), ΔE 0.013 away. Black text reads best on it, at 13.42:1.
| Hue family | Yellows |
| Lightness | light (85%) |
| Chroma | vivid (0.144) |
| Temperature | warm |
| Nearest name | Maize (#F4D054) |
| Black text | 13.42:1 |
| White text | 1.56:1 |
Values
| HEX | #EFCC51 |
| RGB | rgb(239, 204, 81) |
| HSL | hsl(47, 83%, 63%) |
| OKLCH | oklch(85.3% 0.144 93.1) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #EFCC51 | 1.56:1 | Fails | Lc -29.0 | Dividers and decoration only |
| Black text on #EFCC51 | 13.42:1 | AAA | Lc 78.1 | Fine for body text |
| #EFCC51 text on white | 1.56:1 | Fails | Lc 25.7 | Dividers and decoration only |
| #EFCC51 text on black | 13.42:1 | AAA | Lc -77.4 | Fine for body text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 200.
-
Step 50
50
#FBF5E3
oklch(97% 0.025 91.6)
-
Step 100
100
#F6EAC2
oklch(93.7% 0.054 93.3)
-
Step 200
200 (this color)
#EFCC51
oklch(85.3% 0.144 93.1)
-
Step 300
300
#E5BC00
oklch(80.8% 0.165 93)
-
Step 400
400
#C09D00
oklch(70.7% 0.145 92.8)
-
Step 500
500
#A48600
oklch(63% 0.129 93)
-
Step 600
600
#8A7100
oklch(55.6% 0.114 93.5)
-
Step 700
700
#745E00
oklch(49% 0.1 92.9)
-
Step 800
800
#5F4D00
oklch(42.6% 0.087 93.4)
-
Step 900
900
#504000
oklch(37.8% 0.077 92.8)
-
Step 950
950
#302500
oklch(26.9% 0.055 91.9)
#EFCC51 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #E1C942 | 0.026 |
| Deuteranopia (no green cones) | #E9D357 | 0.018 |
| Tritanopia (no blue cones) | #FFBDB2 | 0.130 |
| Achromatopsia (no color) | #CFCFCF | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EFCC51
#EFCC51
oklch(85.3% 0.144 93.1)
- #BFCCFF
#BFCCFF
oklch(85.3% 0.073 273.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #EFCC51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Maize #F4D054 ΔE 0.013
- Light Mustard #F7D560 ΔE 0.027
- Golden Yellow #FEC615 ΔE 0.031
- Sunflower #FFC512 ΔE 0.033
- Sunglow #FFD166 ΔE 0.033
- Maximum Yellow Red #FCBF49 ΔE 0.035
- Saffron #E9C46A ΔE 0.035
- Marigold #FCC006 ΔE 0.037
Use #EFCC51 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.