#E66551
Closest named color: Burnt Sienna (#E76F51). oklch(66.3% 0.165 30.8), rgb(230, 101, 81).
Aa
Black text reads best on this color (6.34:1).
About this color
#E66551 is a medium-light, vivid red. In OKLCH its lightness is 66%, its chroma 0.165 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Sienna (#E76F51), ΔE 0.022 away. Black text reads best on it, at 6.34:1.
| Hue family | Reds |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.165) |
| Temperature | warm |
| Nearest name | Burnt Sienna (#E76F51) |
| Black text | 6.34:1 |
| White text | 3.30:1 |
Values
| HEX | #E66551 |
| RGB | rgb(230, 101, 81) |
| HSL | hsl(8, 75%, 61%) |
| OKLCH | oklch(66.3% 0.165 30.8) |
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 #E66551 | 3.30:1 | AA large text | Lc -65.2 | Content text, not long reading |
| Black text on #E66551 | 6.34:1 | AA | Lc 44.3 | Non-text elements, placeholder text |
| #E66551 text on white | 3.30:1 | AA large text | Lc 59.8 | Large or bold text, headings |
| #E66551 text on black | 6.34:1 | AA | Lc -41.9 | Non-text elements, placeholder 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 500.
-
Step 50
50
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E5E1
oklch(93.7% 0.023 31.1)
-
Step 200
200
#F5CFC7
oklch(88.5% 0.044 31.9)
-
Step 300
300
#F0AEA1
oklch(80.9% 0.08 31.4)
-
Step 400
400
#E5806E
oklch(70.7% 0.128 31.2)
-
Step 500
500 (this color)
#E66551
oklch(66.3% 0.165 30.8)
-
Step 600
600
#C63B29
oklch(55.6% 0.179 30.7)
-
Step 700
700
#AB2C1B
oklch(49.2% 0.166 31)
-
Step 800
800
#8B2619
oklch(42.7% 0.138 30.7)
-
Step 900
900
#70261B
oklch(37.8% 0.107 31)
-
Step 950
950
#421711
oklch(27% 0.068 30.2)
#E66551 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) | #877C4F | 0.168 |
| Deuteranopia (no green cones) | #A7984E | 0.156 |
| Tritanopia (no blue cones) | #FB4B61 | 0.062 |
| Achromatopsia (no color) | #8D8D8D | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E66551
#E66551
oklch(66.3% 0.165 30.8)
- #00A5BB
#00A5BB
oklch(66.2% 0.115 211.3)
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 #E66551, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Sienna #E76F51 ΔE 0.022
- Pastel Red #DB5856 ΔE 0.038
- Pale Red #D9544D ΔE 0.045
- Grapefruit #FD5956 ΔE 0.045
- Tomato #FF6347 ΔE 0.046
- Dark Peach #DE7E5D ΔE 0.051
- Coral Pink #FF6163 ΔE 0.051
- Terracota #CB6843 ΔE 0.053
Use #E66551 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.