#E1603B
Closest named color: Burnt Sienna (#E76F51). oklch(64.6% 0.17 36.7), rgb(225, 96, 59).
Aa
Black text reads best on this color (5.93:1).
About this color
#E1603B is a medium-light, vivid red. In OKLCH its lightness is 65%, its chroma 0.170 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Sienna (#E76F51), ΔE 0.036 away. Black text reads best on it, at 5.93:1.
| Hue family | Reds |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.170) |
| Temperature | warm |
| Nearest name | Burnt Sienna (#E76F51) |
| Black text | 5.93:1 |
| White text | 3.53:1 |
Values
| HEX | #E1603B |
| RGB | rgb(225, 96, 59) |
| HSL | hsl(13, 73%, 56%) |
| OKLCH | oklch(64.6% 0.17 36.7) |
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 #E1603B | 3.53:1 | AA large text | Lc -67.7 | Content text, not long reading |
| Black text on #E1603B | 5.93:1 | AA | Lc 41.9 | Non-text elements, placeholder text |
| #E1603B text on white | 3.53:1 | AA large text | Lc 62.2 | Content text, not long reading |
| #E1603B text on black | 5.93:1 | AA | Lc -39.5 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F6CFC4
oklch(88.5% 0.047 36.3)
-
Step 300
300
#F1AE9B
oklch(80.9% 0.084 36.5)
-
Step 400
400
#E68064
oklch(70.6% 0.133 36.2)
-
Step 500
500 (this color)
#E1603B
oklch(64.6% 0.17 36.7)
-
Step 600
600
#C73B06
oklch(55.5% 0.184 36.7)
-
Step 700
700
#AA2F00
oklch(49.1% 0.166 36.6)
-
Step 800
800
#8C2602
oklch(42.7% 0.143 36.5)
-
Step 900
900
#70260F
oklch(37.7% 0.11 37)
-
Step 950
950
#42170B
oklch(26.9% 0.07 36.4)
#E1603B 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) | #837636 | 0.170 |
| Deuteranopia (no green cones) | #A39337 | 0.155 |
| Tritanopia (no blue cones) | #F74358 | 0.073 |
| Achromatopsia (no color) | #888888 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E1603B
#E1603B
oklch(64.6% 0.17 36.7)
- #009EBB
#009EBB
oklch(64.5% 0.115 217)
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 #E1603B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Sienna #E76F51 ΔE 0.036
- Pale Red #D9544D ΔE 0.040
- Terracota #CB6843 ΔE 0.040
- Pastel Red #DB5856 ΔE 0.041
- Terracotta #CA6641 ΔE 0.042
- Chocolate #D2691E ΔE 0.043
- Deep Orange #DC4D01 ΔE 0.043
- Terra Cotta #C9643B ΔE 0.044
Use #E1603B 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.