#EF733C
Closest named color: Burnt Sienna (#E76F51). oklch(69.3% 0.168 42.8), rgb(239, 115, 60).
Aa
Black text reads best on this color (7.18:1).
About this color
#EF733C is a medium-light, vivid orange. In OKLCH its lightness is 69%, its chroma 0.168 and its hue 43°. 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 7.18:1.
| Hue family | Oranges |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.168) |
| Temperature | warm |
| Nearest name | Burnt Sienna (#E76F51) |
| Black text | 7.18:1 |
| White text | 2.92:1 |
Values
| HEX | #EF733C |
| RGB | rgb(239, 115, 60) |
| HSL | hsl(18, 85%, 59%) |
| OKLCH | oklch(69.3% 0.168 42.8) |
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 #EF733C | 2.92:1 | Fails | Lc -60.3 | Content text, not long reading |
| Black text on #EF733C | 7.18:1 | AAA | Lc 49.0 | Large or bold text, headings |
| #EF733C text on white | 2.92:1 | Fails | Lc 55.0 | Large or bold text, headings |
| #EF733C text on black | 7.18:1 | AAA | Lc -46.8 | Large or bold text, headings |
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
#FEF3EE
oklch(97.1% 0.014 46.2)
-
Step 100
100
#FDE4DA
oklch(93.6% 0.031 43.1)
-
Step 200
200
#FCCDBB
oklch(88.4% 0.059 42)
-
Step 300
300
#FAAA8A
oklch(80.8% 0.105 42.6)
-
Step 400
400 (this color)
#EF733C
oklch(69.3% 0.168 42.8)
-
Step 500
500
#E15700
oklch(63% 0.187 42.8)
-
Step 600
600
#BE4800
oklch(55.5% 0.165 42.7)
-
Step 700
700
#A13C00
oklch(49.1% 0.146 42.8)
-
Step 800
800
#853000
oklch(42.7% 0.127 42.7)
-
Step 900
900
#702700
oklch(37.7% 0.113 42.6)
-
Step 950
950
#451500
oklch(27% 0.081 42.7)
#EF733C 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) | #958635 | 0.159 |
| Deuteranopia (no green cones) | #B4A239 | 0.145 |
| Tritanopia (no blue cones) | #FF5867 | 0.083 |
| Achromatopsia (no color) | #979797 | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF733C
#EF733C
oklch(69.3% 0.168 42.8)
- #00ADD6
#00ADD6
oklch(69.4% 0.129 222.7)
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 #EF733C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Sienna #E76F51 ΔE 0.029
- Pinkish Orange #FF724C ΔE 0.034
- Dusty Orange #F0833A ΔE 0.036
- Orange Pink #FF6F52 ΔE 0.038
- Melon #FF7855 ΔE 0.039
- Dark Peach #DE7E5D ΔE 0.041
- Pumpkin #E17701 ΔE 0.042
- Coral #FF7F50 ΔE 0.043
Use #EF733C 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.