#E5603D
Closest named color: Burnt Sienna (#E76F51). oklch(65.2% 0.173 35.7), rgb(229, 96, 61).
Aa
Black text reads best on this color (6.07:1).
About this color
#E5603D is a medium-light, vivid red. In OKLCH its lightness is 65%, its chroma 0.173 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Sienna (#E76F51), ΔE 0.032 away. Black text reads best on it, at 6.07:1.
| Hue family | Reds |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.173) |
| Temperature | warm |
| Nearest name | Burnt Sienna (#E76F51) |
| Black text | 6.07:1 |
| White text | 3.45:1 |
Values
| HEX | #E5603D |
| RGB | rgb(229, 96, 61) |
| HSL | hsl(12, 76%, 57%) |
| OKLCH | oklch(65.2% 0.173 35.7) |
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 #E5603D | 3.45:1 | AA large text | Lc -66.8 | Content text, not long reading |
| Black text on #E5603D | 6.07:1 | AA | Lc 42.7 | Non-text elements, placeholder text |
| #E5603D text on white | 3.45:1 | AA large text | Lc 61.3 | Content text, not long reading |
| #E5603D text on black | 6.07:1 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#FAE5DF
oklch(93.7% 0.025 36.5)
-
Step 200
200
#F6CFC4
oklch(88.5% 0.047 36.3)
-
Step 300
300
#F2AE9B
oklch(81% 0.085 36.2)
-
Step 400
400
#E87F64
oklch(70.7% 0.136 35.4)
-
Step 500
500 (this color)
#E5603D
oklch(65.2% 0.173 35.7)
-
Step 600
600
#C93807
oklch(55.6% 0.188 35.6)
-
Step 700
700
#AB2C00
oklch(49% 0.169 35.7)
-
Step 800
800
#8D2403
oklch(42.7% 0.145 35.5)
-
Step 900
900
#71240F
oklch(37.6% 0.113 35.7)
-
Step 950
950
#43170B
oklch(27.1% 0.072 36.1)
#E5603D 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) | #857839 | 0.173 |
| Deuteranopia (no green cones) | #A59539 | 0.160 |
| Tritanopia (no blue cones) | #FB4259 | 0.073 |
| Achromatopsia (no color) | #8A8A8A | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E5603D
#E5603D
oklch(65.2% 0.173 35.7)
- #00A1BC
#00A1BC
oklch(65.3% 0.115 215.3)
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 #E5603D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Sienna #E76F51 ΔE 0.032
- Pastel Red #DB5856 ΔE 0.042
- Pale Red #D9544D ΔE 0.043
- Orange Pant #FB5607 ΔE 0.045
- Terracota #CB6843 ΔE 0.047
- Deep Orange #DC4D01 ΔE 0.047
- Chocolate #D2691E ΔE 0.049
- Terracotta #CA6641 ΔE 0.049
Use #E5603D 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.