#EF9F00
Closest named color: Gamboge (#EE9B00). oklch(76.3% 0.162 73.2), rgb(239, 159, 0).
Aa
Black text reads best on this color (9.62:1).
About this color
#EF9F00 is a medium-light, vivid orange. In OKLCH its lightness is 76%, its chroma 0.162 and its hue 73°. Its hue sits on the warm side of the wheel. The nearest named color is Gamboge (#EE9B00), ΔE 0.010 away. Black text reads best on it, at 9.62:1.
| Hue family | Oranges |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.162) |
| Temperature | warm |
| Nearest name | Gamboge (#EE9B00) |
| Black text | 9.62:1 |
| White text | 2.18:1 |
Values
| HEX | #EF9F00 |
| RGB | rgb(239, 159, 0) |
| HSL | hsl(40, 100%, 47%) |
| OKLCH | oklch(76.3% 0.162 73.2) |
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 #EF9F00 | 2.18:1 | Fails | Lc -47.2 | Large or bold text, headings |
| Black text on #EF9F00 | 9.62:1 | AAA | Lc 61.4 | Content text, not long reading |
| #EF9F00 text on white | 2.18:1 | Fails | Lc 42.5 | Non-text elements, placeholder text |
| #EF9F00 text on black | 9.62:1 | AAA | Lc -59.7 | 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 300.
-
Step 50
50
#FFF4E6
oklch(97.2% 0.022 74.1)
-
Step 100
100
#FEE6C8
oklch(93.7% 0.047 73.3)
-
Step 200
200
#FED096
oklch(88.4% 0.09 72.7)
-
Step 300
300 (this color)
#EF9F00
oklch(76.3% 0.162 73.2)
-
Step 400
400
#D88F00
oklch(70.7% 0.15 73.1)
-
Step 500
500
#B97A00
oklch(63% 0.134 73.2)
-
Step 600
600
#9C6600
oklch(55.5% 0.118 73)
-
Step 700
700
#845600
oklch(49.2% 0.105 73.4)
-
Step 800
800
#6C4600
oklch(42.7% 0.091 73.9)
-
Step 900
900
#5B3A00
oklch(37.8% 0.08 73.5)
-
Step 950
950
#372100
oklch(27% 0.057 72.9)
#EF9F00 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) | #BBA400 | 0.085 |
| Deuteranopia (no green cones) | #CEB70F | 0.076 |
| Tritanopia (no blue cones) | #FF8A87 | 0.132 |
| Achromatopsia (no color) | #B0B0B0 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF9F00
#EF9F00
oklch(76.3% 0.162 73.2)
- #77B6FF
#77B6FF
oklch(76.3% 0.124 253)
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 #EF9F00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gamboge #EE9B00 ΔE 0.010
- Squash #F2AB15 ΔE 0.029
- Orange #FFA500 ΔE 0.032
- Goldenrod #DAA520 ΔE 0.035
- Mango #FFA62B ΔE 0.035
- Tangerine #FF9408 ΔE 0.036
- Orange Yellow #FFAD01 ΔE 0.045
- Light Orange #FDAA48 ΔE 0.045
Use #EF9F00 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.