#F5991B
Closest named color: Gamboge (#EE9B00). oklch(76% 0.163 66.4), rgb(245, 153, 27).
Aa
Black text reads best on this color (9.45:1).
About this color
#F5991B is a medium-light, vivid orange. In OKLCH its lightness is 76%, 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 0.015 away. Black text reads best on it, at 9.45:1.
| Hue family | Oranges |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.163) |
| Temperature | warm |
| Nearest name | Gamboge (#EE9B00) |
| Black text | 9.45:1 |
| White text | 2.22:1 |
Values
| HEX | #F5991B |
| RGB | rgb(245, 153, 27) |
| HSL | hsl(35, 92%, 53%) |
| OKLCH | oklch(76% 0.163 66.4) |
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 #F5991B | 2.22:1 | Fails | Lc -48.1 | Large or bold text, headings |
| Black text on #F5991B | 9.45:1 | AAA | Lc 60.6 | Content text, not long reading |
| #F5991B text on white | 2.22:1 | Fails | Lc 43.4 | Non-text elements, placeholder text |
| #F5991B text on black | 9.45:1 | AAA | Lc -58.8 | 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 300.
-
Step 50
50
#FFF3E8
oklch(97.1% 0.02 65.1)
-
Step 100
100
#FFE5CB
oklch(93.6% 0.045 67.2)
-
Step 200
200
#FFCF9F
oklch(88.5% 0.083 66.4)
-
Step 300
300 (this color)
#F5991B
oklch(76% 0.163 66.4)
-
Step 400
400
#E18900
oklch(70.7% 0.157 66)
-
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)
#F5991B 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) | #B7A100 | 0.104 |
| Deuteranopia (no green cones) | #CCB61F | 0.093 |
| Tritanopia (no blue cones) | #FF8383 | 0.121 |
| Achromatopsia (no color) | #AEAEAE | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #F5991B
#F5991B
oklch(76% 0.163 66.4)
- #65B8FF
#65B8FF
oklch(75.9% 0.131 246.4)
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 #F5991B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gamboge #EE9B00 ΔE 0.015
- Tangerine #FF9408 ΔE 0.018
- Dark Orange #FF8C00 ΔE 0.031
- Orange #FFA500 ΔE 0.036
- Mango #FFA62B ΔE 0.036
- Faded Orange #F0944D ΔE 0.037
- Pastel Orange #FF964F ΔE 0.041
- Squash #F2AB15 ΔE 0.044
Use #F5991B 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.