#EF911C
Closest named color: Gamboge (#EE9B00). oklch(73.9% 0.16 63.9), rgb(239, 145, 28).
Aa
Black text reads best on this color (8.73:1).
About this color
#EF911C is a medium-light, vivid orange. In OKLCH its lightness is 74%, its chroma 0.160 and its hue 64°. Its hue sits on the warm side of the wheel. The nearest named color is Gamboge (#EE9B00), ΔE 0.026 away. Black text reads best on it, at 8.73:1.
| Hue family | Oranges |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.160) |
| Temperature | warm |
| Nearest name | Gamboge (#EE9B00) |
| Black text | 8.73:1 |
| White text | 2.40:1 |
Values
| HEX | #EF911C |
| RGB | rgb(239, 145, 28) |
| HSL | hsl(33, 87%, 52%) |
| OKLCH | oklch(73.9% 0.16 63.9) |
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 #EF911C | 2.40:1 | Fails | Lc -51.9 | Large or bold text, headings |
| Black text on #EF911C | 8.73:1 | AAA | Lc 57.1 | Large or bold text, headings |
| #EF911C text on white | 2.40:1 | Fails | Lc 46.9 | Large or bold text, headings |
| #EF911C text on black | 8.73:1 | AAA | Lc -55.1 | 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
#FCF4EC
oklch(97.1% 0.014 67.7)
-
Step 100
100
#F8E6D6
oklch(93.5% 0.029 64.1)
-
Step 200
200
#F4D2B4
oklch(88.5% 0.055 63.4)
-
Step 300
300
#EEB37B
oklch(80.9% 0.1 64.2)
-
Step 400
400 (this color)
#EF911C
oklch(73.9% 0.16 63.9)
-
Step 500
500
#C47300
oklch(63.1% 0.143 63.7)
-
Step 600
600
#A56000
oklch(55.5% 0.126 63.7)
-
Step 700
700
#8B5000
oklch(49% 0.111 63.7)
-
Step 800
800
#734100
oklch(42.7% 0.097 63.4)
-
Step 900
900
#603600
oklch(37.7% 0.085 64.2)
-
Step 950
950
#3B1F00
oklch(27.1% 0.061 64)
#EF911C 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) | #AF9A00 | 0.109 |
| Deuteranopia (no green cones) | #C5B01E | 0.098 |
| Tritanopia (no blue cones) | #FF7B7D | 0.118 |
| Achromatopsia (no color) | #A7A7A7 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF911C
#EF911C
oklch(73.9% 0.16 63.9)
- #4BB3FF
#4BB3FF
oklch(73.9% 0.146 243.9)
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 #EF911C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gamboge #EE9B00 ΔE 0.026
- Dark Orange #FF8C00 ΔE 0.028
- Tangerine #FF9408 ΔE 0.029
- Faded Orange #F0944D ΔE 0.030
- Orange Wheel #F77F00 ΔE 0.039
- Dusty Orange #F0833A ΔE 0.041
- Pumpkin Orange #FB7D07 ΔE 0.045
- Pastel Orange #FF964F ΔE 0.045
Use #EF911C 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.