#EC663B
Closest named color: Burnt Sienna (#E76F51). oklch(67% 0.176 38), rgb(236, 102, 59).
Aa
Black text reads best on this color (6.53:1).
About this color
#EC663B is a medium-light, vivid red. In OKLCH its lightness is 67%, its chroma 0.176 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Sienna (#E76F51), ΔE 0.023 away. Black text reads best on it, at 6.53:1.
| Hue family | Reds |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.176) |
| Temperature | warm |
| Nearest name | Burnt Sienna (#E76F51) |
| Black text | 6.53:1 |
| White text | 3.21:1 |
Values
| HEX | #EC663B |
| RGB | rgb(236, 102, 59) |
| HSL | hsl(15, 82%, 58%) |
| OKLCH | oklch(67% 0.176 38) |
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 #EC663B | 3.21:1 | AA large text | Lc -64.0 | Content text, not long reading |
| Black text on #EC663B | 6.53:1 | AA | Lc 45.4 | Large or bold text, headings |
| #EC663B text on white | 3.21:1 | AA large text | Lc 58.6 | Large or bold text, headings |
| #EC663B text on black | 6.53:1 | AA | Lc -43.1 | 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 400.
-
Step 50
50
#FFF2EE
oklch(97% 0.015 37.9)
-
Step 100
100
#FEE3DB
oklch(93.6% 0.032 37.1)
-
Step 200
200
#FECCBC
oklch(88.5% 0.061 38.5)
-
Step 300
300
#FEA78D
oklch(80.8% 0.11 37.4)
-
Step 400
400 (this color)
#EC663B
oklch(67% 0.176 38)
-
Step 500
500
#EB4A00
oklch(63.1% 0.207 37.9)
-
Step 600
600
#C63D00
oklch(55.5% 0.182 37.9)
-
Step 700
700
#A83200
oklch(49.1% 0.162 37.8)
-
Step 800
800
#8B2800
oklch(42.8% 0.14 37.9)
-
Step 900
900
#752000
oklch(37.7% 0.124 37.7)
-
Step 950
950
#481000
oklch(26.9% 0.089 37.6)
#EC663B 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) | #8B7D36 | 0.174 |
| Deuteranopia (no green cones) | #AC9B37 | 0.160 |
| Tritanopia (no blue cones) | #FF485D | 0.076 |
| Achromatopsia (no color) | #8F8F8F | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EC663B
#EC663B
oklch(67% 0.176 38)
- #00A6C6
#00A6C6
oklch(66.9% 0.12 218.1)
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 #EC663B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Sienna #E76F51 ΔE 0.023
- Orange Pant #FB5607 ΔE 0.037
- Tomato #FF6347 ΔE 0.037
- Bright Orange #FF5B00 ΔE 0.040
- Orange Pink #FF6F52 ΔE 0.046
- Pinkish Orange #FF724C ΔE 0.047
- Blood Orange #FE4B03 ΔE 0.049
- Grapefruit #FD5956 ΔE 0.051
Use #EC663B 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.