#EF9309
Closest named color: Gamboge (#EE9B00). oklch(74.2% 0.163 66.3), rgb(239, 147, 9).
Aa
Black text reads best on this color (8.84:1).
About this color
#EF9309 is a medium-light, vivid orange. In OKLCH its lightness is 74%, its chroma 0.163 and its hue 66°. Its hue sits on the warm side of the wheel. The nearest named color is Gamboge (#EE9B00), ΔE 0.019 away. Black text reads best on it, at 8.84:1.
| Hue family | Oranges |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.163) |
| Temperature | warm |
| Nearest name | Gamboge (#EE9B00) |
| Black text | 8.84:1 |
| White text | 2.37:1 |
Values
| HEX | #EF9309 |
| RGB | rgb(239, 147, 9) |
| HSL | hsl(36, 93%, 49%) |
| OKLCH | oklch(74.2% 0.163 66.3) |
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 #EF9309 | 2.37:1 | Fails | Lc -51.3 | Large or bold text, headings |
| Black text on #EF9309 | 8.84:1 | AAA | Lc 57.6 | Large or bold text, headings |
| #EF9309 text on white | 2.37:1 | Fails | Lc 46.3 | Large or bold text, headings |
| #EF9309 text on black | 8.84:1 | AAA | Lc -55.7 | 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
#F8E7D6
oklch(93.7% 0.029 67.5)
-
Step 200
200
#F4D2B2
oklch(88.4% 0.057 65.3)
-
Step 300
300
#EEB478
oklch(81% 0.102 66.5)
-
Step 400
400 (this color)
#EF9309
oklch(74.2% 0.163 66.3)
-
Step 500
500
#C17500
oklch(63% 0.14 66.2)
-
Step 600
600
#A36200
oklch(55.6% 0.124 66.2)
-
Step 700
700
#895200
oklch(49.1% 0.109 66.6)
-
Step 800
800
#714300
oklch(42.8% 0.095 66.9)
-
Step 900
900
#5F3700
oklch(37.8% 0.084 66.2)
-
Step 950
950
#3A1F00
oklch(27% 0.06 65.1)
#EF9309 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) | #B19B00 | 0.104 |
| Deuteranopia (no green cones) | #C6B10F | 0.095 |
| Tritanopia (no blue cones) | #FF7D7D | 0.122 |
| Achromatopsia (no color) | #A8A8A8 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF9309
#EF9309
oklch(74.2% 0.163 66.3)
- #56B3FF
#56B3FF
oklch(74.3% 0.141 246)
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 #EF9309, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gamboge #EE9B00 ΔE 0.019
- Tangerine #FF9408 ΔE 0.028
- Dark Orange #FF8C00 ΔE 0.030
- Faded Orange #F0944D ΔE 0.036
- Orange Wheel #F77F00 ΔE 0.045
- Dusty Orange #F0833A ΔE 0.049
- Pastel Orange #FF964F ΔE 0.049
- Pumpkin Orange #FB7D07 ΔE 0.051
Use #EF9309 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.