#E1643B
Closest named color: Burnt Sienna (#E76F51). oklch(65.1% 0.166 38.3), rgb(225, 100, 59).
Aa
Black text reads best on this color (6.08:1).
About this color
#E1643B is a medium-light, vivid red. In OKLCH its lightness is 65%, its chroma 0.166 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Sienna (#E76F51), ΔE 0.030 away. Black text reads best on it, at 6.08:1.
| Hue family | Reds |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.166) |
| Temperature | warm |
| Nearest name | Burnt Sienna (#E76F51) |
| Black text | 6.08:1 |
| White text | 3.44:1 |
Values
| HEX | #E1643B |
| RGB | rgb(225, 100, 59) |
| HSL | hsl(15, 73%, 56%) |
| OKLCH | oklch(65.1% 0.166 38.3) |
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 #E1643B | 3.44:1 | AA large text | Lc -66.8 | Content text, not long reading |
| Black text on #E1643B | 6.08:1 | AA | Lc 42.7 | Non-text elements, placeholder text |
| #E1643B text on white | 3.44:1 | AA large text | Lc 61.3 | Content text, not long reading |
| #E1643B text on black | 6.08:1 | AA | Lc -40.4 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F5D0C4
oklch(88.6% 0.045 38.8)
-
Step 300
300
#EFAF9B
oklch(80.9% 0.081 38.1)
-
Step 400
400
#E58263
oklch(70.8% 0.13 38.1)
-
Step 500
500 (this color)
#E1643B
oklch(65.1% 0.166 38.3)
-
Step 600
600
#C53E01
oklch(55.5% 0.18 38.2)
-
Step 700
700
#A73300
oklch(49% 0.16 38.2)
-
Step 800
800
#8A2900
oklch(42.7% 0.139 38.4)
-
Step 900
900
#6F270E
oklch(37.7% 0.108 38.3)
-
Step 950
950
#41180A
oklch(26.9% 0.068 38.9)
#E1643B 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) | #867936 | 0.164 |
| Deuteranopia (no green cones) | #A59538 | 0.150 |
| Tritanopia (no blue cones) | #F7495B | 0.075 |
| Achromatopsia (no color) | #8A8A8A | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E1643B
#E1643B
oklch(65.1% 0.166 38.3)
- #00A0BF
#00A0BF
oklch(65.2% 0.117 218.1)
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 #E1643B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Sienna #E76F51 ΔE 0.030
- Chocolate #D2691E ΔE 0.039
- Terracota #CB6843 ΔE 0.039
- Terracotta #CA6641 ΔE 0.042
- Terra Cotta #C9643B ΔE 0.044
- Pastel Red #DB5856 ΔE 0.047
- Pale Red #D9544D ΔE 0.047
- Deep Orange #DC4D01 ΔE 0.048
Use #E1643B 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.