#EC633F
Closest named color: Burnt Sienna (#E76F51). oklch(66.7% 0.177 35.7), rgb(236, 99, 63).
Aa
Black text reads best on this color (6.42:1).
About this color
#EC633F is a medium-light, vivid red. In OKLCH its lightness is 67%, its chroma 0.177 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Sienna (#E76F51), ΔE 0.025 away. Black text reads best on it, at 6.42:1.
| Hue family | Reds |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Burnt Sienna (#E76F51) |
| Black text | 6.42:1 |
| White text | 3.26:1 |
Values
| HEX | #EC633F |
| RGB | rgb(236, 99, 63) |
| HSL | hsl(12, 82%, 59%) |
| OKLCH | oklch(66.7% 0.177 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 #EC633F | 3.26:1 | AA large text | Lc -64.6 | Content text, not long reading |
| Black text on #EC633F | 6.42:1 | AA | Lc 44.8 | Non-text elements, placeholder text |
| #EC633F text on white | 3.26:1 | AA large text | Lc 59.2 | Large or bold text, headings |
| #EC633F text on black | 6.42:1 | AA | Lc -42.5 | 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
#FAE4DF
oklch(93.5% 0.025 32.9)
-
Step 200
200
#F7CFC4
oklch(88.6% 0.048 35.9)
-
Step 300
300
#F3AD9A
oklch(80.9% 0.087 35.8)
-
Step 400
400
#E97E62
oklch(70.7% 0.139 35.6)
-
Step 500
500 (this color)
#EC633F
oklch(66.7% 0.177 35.7)
-
Step 600
600
#CA3600
oklch(55.5% 0.191 35.7)
-
Step 700
700
#AB2C00
oklch(49% 0.169 35.7)
-
Step 800
800
#8E2300
oklch(42.8% 0.148 35.7)
-
Step 900
900
#72230D
oklch(37.6% 0.116 35.7)
-
Step 950
950
#43160A
oklch(26.9% 0.073 35.8)
#EC633F 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) | #897B3B | 0.178 |
| Deuteranopia (no green cones) | #AA9A3B | 0.165 |
| Tritanopia (no blue cones) | #FF445B | 0.072 |
| Achromatopsia (no color) | #8E8E8E | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EC633F
#EC633F
oklch(66.7% 0.177 35.7)
- #00A6C2
#00A6C2
oklch(66.8% 0.118 215.4)
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 #EC633F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Sienna #E76F51 ΔE 0.025
- Tomato #FF6347 ΔE 0.036
- Orange Pant #FB5607 ΔE 0.037
- Bright Orange #FF5B00 ΔE 0.042
- Grapefruit #FD5956 ΔE 0.045
- Blood Orange #FE4B03 ΔE 0.047
- Orange Pink #FF6F52 ΔE 0.047
- Pinkish Orange #FF724C ΔE 0.050
Use #EC633F 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.