#EC663F
Closest named color: Burnt Sienna (#E76F51). oklch(67.1% 0.175 36.8), rgb(236, 102, 63).
Aa
Black text reads best on this color (6.53:1).
About this color
#EC663F is a medium-light, vivid red. In OKLCH its lightness is 67%, its chroma 0.175 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Sienna (#E76F51), ΔE 0.021 away. Black text reads best on it, at 6.53:1.
| Hue family | Reds |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.175) |
| Temperature | warm |
| Nearest name | Burnt Sienna (#E76F51) |
| Black text | 6.53:1 |
| White text | 3.21:1 |
Values
| HEX | #EC663F |
| RGB | rgb(236, 102, 63) |
| HSL | hsl(14, 82%, 59%) |
| OKLCH | oklch(67.1% 0.175 36.8) |
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 #EC663F | 3.21:1 | AA large text | Lc -64.0 | Content text, not long reading |
| Black text on #EC663F | 6.53:1 | AA | Lc 45.5 | Large or bold text, headings |
| #EC663F text on white | 3.21:1 | AA large text | Lc 58.6 | Large or bold text, headings |
| #EC663F text on black | 6.53:1 | AA | Lc -43.2 | 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
#FFF2EF
oklch(97.1% 0.015 33.1)
-
Step 100
100
#FEE3DB
oklch(93.6% 0.032 37.1)
-
Step 200
200
#FECCBD
oklch(88.5% 0.061 37.3)
-
Step 300
300
#FEA78E
oklch(80.8% 0.109 36.8)
-
Step 400
400 (this color)
#EC663F
oklch(67.1% 0.175 36.8)
-
Step 500
500
#ED4600
oklch(63.1% 0.212 36.8)
-
Step 600
600
#C83A00
oklch(55.6% 0.186 36.9)
-
Step 700
700
#A93000
oklch(49.1% 0.164 37)
-
Step 800
800
#8C2600
oklch(42.7% 0.143 37)
-
Step 900
900
#761E00
oklch(37.7% 0.127 36.7)
-
Step 950
950
#490F00
oklch(27% 0.091 36.7)
#EC663F 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) | #8B7D3A | 0.174 |
| Deuteranopia (no green cones) | #AC9B3B | 0.160 |
| Tritanopia (no blue cones) | #FF485E | 0.075 |
| Achromatopsia (no color) | #909090 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EC663F
#EC663F
oklch(67.1% 0.175 36.8)
- #00A7C5
#00A7C5
oklch(67.1% 0.12 216.7)
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 #EC663F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Sienna #E76F51 ΔE 0.021
- Tomato #FF6347 ΔE 0.036
- Orange Pant #FB5607 ΔE 0.038
- Bright Orange #FF5B00 ΔE 0.042
- Orange Pink #FF6F52 ΔE 0.044
- Pinkish Orange #FF724C ΔE 0.046
- Grapefruit #FD5956 ΔE 0.048
- Blood Orange #FE4B03 ΔE 0.050
Use #EC663F 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.