#EF6740
Closest named color: Burnt Sienna (#E76F51). oklch(67.6% 0.177 36.7), rgb(239, 103, 64).
Aa
Black text reads best on this color (6.68:1).
About this color
#EF6740 is a medium-light, vivid red. In OKLCH its lightness is 68%, its chroma 0.177 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 6.68:1.
| Hue family | Reds |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Burnt Sienna (#E76F51) |
| Black text | 6.68:1 |
| White text | 3.14:1 |
Values
| HEX | #EF6740 |
| RGB | rgb(239, 103, 64) |
| HSL | hsl(13, 85%, 59%) |
| OKLCH | oklch(67.6% 0.177 36.7) |
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 #EF6740 | 3.14:1 | AA large text | Lc -63.1 | Content text, not long reading |
| Black text on #EF6740 | 6.68:1 | AA | Lc 46.3 | Large or bold text, headings |
| #EF6740 text on white | 3.14:1 | AA large text | Lc 57.7 | Large or bold text, headings |
| #EF6740 text on black | 6.68:1 | AA | Lc -44.0 | 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
#FFCCBD
oklch(88.6% 0.062 37)
-
Step 300
300
#FFA78E
oklch(80.9% 0.111 36.6)
-
Step 400
400 (this color)
#EF6740
oklch(67.6% 0.177 36.7)
-
Step 500
500
#ED4600
oklch(63.1% 0.212 36.8)
-
Step 600
600
#C93900
oklch(55.6% 0.188 36.5)
-
Step 700
700
#AA2F00
oklch(49.1% 0.166 36.6)
-
Step 800
800
#8C2500
oklch(42.6% 0.144 36.6)
-
Step 900
900
#761E00
oklch(37.7% 0.127 36.7)
-
Step 950
950
#490F00
oklch(27% 0.091 36.7)
#EF6740 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) | #8C7F3B | 0.177 |
| Deuteranopia (no green cones) | #AE9D3C | 0.162 |
| Tritanopia (no blue cones) | #FF495F | 0.073 |
| Achromatopsia (no color) | #919191 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF6740
#EF6740
oklch(67.6% 0.177 36.7)
- #00A9C7
#00A9C7
oklch(67.7% 0.121 216.4)
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 #EF6740, 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 0.031
- Orange Pant #FB5607 ΔE 0.037
- Orange Pink #FF6F52 ΔE 0.038
- Bright Orange #FF5B00 ΔE 0.039
- Pinkish Orange #FF724C ΔE 0.040
- Grapefruit #FD5956 ΔE 0.045
- Blood Orange #FE4B03 ΔE 0.049
Use #EF6740 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.