#FFFF81
Named color: Butter. oklch(97.5% 0.148 108.9), rgb(255, 255, 129).
Aa
Black text reads best on this color (19.87:1).
About this color
#FFFF81 is a very light, vivid yellow. In OKLCH its lightness is 98%, its chroma 0.148 and its hue 109°. Its hue sits on the warm side of the wheel. It is the named color Butter. Black text reads best on it, at 19.87:1.
| Hue family | Yellows |
| Lightness | very light (98%) |
| Chroma | vivid (0.148) |
| Temperature | warm |
| Nearest name | Butter |
| Black text | 19.87:1 |
| White text | 1.05:1 |
Values
| HEX | #FFFF81 |
| RGB | rgb(255, 255, 129) |
| HSL | hsl(60, 100%, 75%) |
| OKLCH | oklch(97.5% 0.148 108.9) |
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 #FFFF81 | 1.05:1 | Fails | Lc 0.0 | Not readable |
| Black text on #FFFF81 | 19.87:1 | AAA | Lc 102.3 | Preferred for body text |
| #FFFF81 text on white | 1.05:1 | Fails | Lc 0.0 | Not readable |
| #FFFF81 text on black | 19.87:1 | AAA | Lc -103.7 | Preferred 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 50.
-
Step 50
50 (this color)
#FFFF81
oklch(97.5% 0.148 108.9)
-
Step 100
100
#ECEEC3
oklch(93.7% 0.056 109.6)
-
Step 200
200
#DEDF8B
oklch(88.4% 0.106 109)
-
Step 300
300
#CBC800
oklch(80.9% 0.175 108.7)
-
Step 400
400
#A9A700
oklch(70.7% 0.153 108.9)
-
Step 500
500
#918F00
oklch(63.1% 0.137 108.8)
-
Step 600
600
#7A7800
oklch(55.6% 0.12 108.6)
-
Step 700
700
#666500
oklch(49.1% 0.107 109.1)
-
Step 800
800
#535200
oklch(42.6% 0.092 108.9)
-
Step 900
900
#454400
oklch(37.5% 0.081 108.8)
-
Step 950
950
#292800
oklch(26.9% 0.058 108.3)
#FFFF81 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) | #FFF675 | 0.022 |
| Deuteranopia (no green cones) | #FFFB87 | 0.013 |
| Tritanopia (no blue cones) | #FFF2E2 | 0.129 |
| Achromatopsia (no color) | #F9F9F9 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #FFFF81
#FFFF81
oklch(97.5% 0.148 108.9)
- #F6F6FF
#F6F6FF
oklch(97.6% 0.012 286.2)
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 #FFFF81, closest first.
No curated palette has a color within ΔE 0.04 of #FFFF81.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Yellow #FEFF7F ΔE 0.003
- Banana #FFFF7E ΔE 0.003
- Pale Yellow #FFFF84 ΔE 0.003
- Custard #FFFD78 ΔE 0.008
- Butter Yellow #FFFD74 ΔE 0.011
- Pastel Yellow #FFFE71 ΔE 0.014
- Manilla #FFFA86 ΔE 0.015
- Straw #FCF679 ΔE 0.023
Use #FFFF81 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.