#E4631B
Closest named color: Chocolate (#D2691E). oklch(65.2% 0.178 44.3), rgb(228, 99, 27).
Aa
Black text reads best on this color (6.09:1).
About this color
#E4631B is a medium-light, vivid orange. In OKLCH its lightness is 65%, its chroma 0.178 and its hue 44°. Its hue sits on the warm side of the wheel. The nearest named color is Chocolate (#D2691E), ΔE 0.033 away. Black text reads best on it, at 6.09:1.
| Hue family | Oranges |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.178) |
| Temperature | warm |
| Nearest name | Chocolate (#D2691E) |
| Black text | 6.09:1 |
| White text | 3.44:1 |
Values
| HEX | #E4631B |
| RGB | rgb(228, 99, 27) |
| HSL | hsl(21, 79%, 50%) |
| OKLCH | oklch(65.2% 0.178 44.3) |
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 #E4631B | 3.44:1 | AA large text | Lc -66.6 | Content text, not long reading |
| Black text on #E4631B | 6.09:1 | AA | Lc 42.9 | Non-text elements, placeholder text |
| #E4631B text on white | 3.44:1 | AA large text | Lc 61.2 | Content text, not long reading |
| #E4631B text on black | 6.09:1 | AA | Lc -40.5 | 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
#FDF3EF
oklch(97.1% 0.012 43.3)
-
Step 100
100
#F9E5DC
oklch(93.6% 0.025 45.9)
-
Step 200
200
#F6D0C0
oklch(88.6% 0.048 44.1)
-
Step 300
300
#F1AF93
oklch(80.9% 0.087 43.9)
-
Step 400
400
#E78153
oklch(70.6% 0.14 44.2)
-
Step 500
500 (this color)
#E4631B
oklch(65.2% 0.178 44.3)
-
Step 600
600
#BC4B00
oklch(55.6% 0.161 44.3)
-
Step 700
700
#9F3E00
oklch(49.1% 0.142 44.2)
-
Step 800
800
#833200
oklch(42.7% 0.123 44.4)
-
Step 900
900
#6E2900
oklch(37.7% 0.109 44.5)
-
Step 950
950
#421803
oklch(27% 0.072 44.7)
#E4631B 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) | #887808 | 0.168 |
| Deuteranopia (no green cones) | #A89514 | 0.151 |
| Tritanopia (no blue cones) | #FB4356 | 0.092 |
| Achromatopsia (no color) | #8A8A8A | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E4631B
#E4631B
oklch(65.2% 0.178 44.3)
- #009FC7
#009FC7
oklch(65.3% 0.123 224)
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 #E4631B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chocolate #D2691E ΔE 0.033
- Burnt Sienna #E76F51 ΔE 0.043
- Orange Pant #FB5607 ΔE 0.043
- Pumpkin #E17701 ΔE 0.045
- Deep Orange #DC4D01 ΔE 0.046
- Bright Orange #FF5B00 ΔE 0.049
- Terracota #CB6843 ΔE 0.050
- Rust #CA6702 ΔE 0.050
Use #E4631B 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.