#EC603D
Closest named color: Burnt Sienna (#E76F51). oklch(66.2% 0.181 35.2), rgb(236, 96, 61).
Aa
Black text reads best on this color (6.30:1).
About this color
#EC603D is a medium-light, vivid red. In OKLCH its lightness is 66%, its chroma 0.181 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Sienna (#E76F51), ΔE 0.029 away. Black text reads best on it, at 6.30:1.
| Hue family | Reds |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.181) |
| Temperature | warm |
| Nearest name | Burnt Sienna (#E76F51) |
| Black text | 6.30:1 |
| White text | 3.32:1 |
Values
| HEX | #EC603D |
| RGB | rgb(236, 96, 61) |
| HSL | hsl(12, 82%, 58%) |
| OKLCH | oklch(66.2% 0.181 35.2) |
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 #EC603D | 3.32:1 | AA large text | Lc -65.3 | Content text, not long reading |
| Black text on #EC603D | 6.30:1 | AA | Lc 44.2 | Non-text elements, placeholder text |
| #EC603D text on white | 3.32:1 | AA large text | Lc 59.9 | Large or bold text, headings |
| #EC603D text on black | 6.30:1 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#FAE4DE
oklch(93.5% 0.026 35.7)
-
Step 200
200
#F8CEC4
oklch(88.5% 0.05 33.6)
-
Step 300
300
#F4AC9A
oklch(80.8% 0.089 34.6)
-
Step 400
400
#EB7D61
oklch(70.7% 0.142 35.3)
-
Step 500
500 (this color)
#EC603D
oklch(66.2% 0.181 35.2)
-
Step 600
600
#CB3400
oklch(55.5% 0.194 35.2)
-
Step 700
700
#AC2B00
oklch(49.1% 0.171 35.3)
-
Step 800
800
#8E2100
oklch(42.6% 0.149 35.1)
-
Step 900
900
#73220D
oklch(37.7% 0.118 35.1)
-
Step 950
950
#44150A
oklch(27% 0.075 34.5)
#EC603D 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) | #877938 | 0.182 |
| Deuteranopia (no green cones) | #A99839 | 0.167 |
| Tritanopia (no blue cones) | #FF3F59 | 0.072 |
| Achromatopsia (no color) | #8D8D8D | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EC603D
#EC603D
oklch(66.2% 0.181 35.2)
- #00A4C0
#00A4C0
oklch(66.2% 0.117 215.6)
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 #EC603D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Sienna #E76F51 ΔE 0.029
- Orange Pant #FB5607 ΔE 0.035
- Tomato #FF6347 ΔE 0.038
- Bright Orange #FF5B00 ΔE 0.042
- Blood Orange #FE4B03 ΔE 0.043
- Grapefruit #FD5956 ΔE 0.044
- Orangey Red #FA4224 ΔE 0.046
- Orange Red #FF4500 ΔE 0.049
Use #EC603D 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.