#FF9311
Closest named color: Tangerine (#FF9408). oklch(76.2% 0.174 60.8), rgb(255, 147, 17).
Aa
Black text reads best on this color (9.43:1).
About this color
#FF9311 is a medium-light, vivid orange. In OKLCH its lightness is 76%, its chroma 0.174 and its hue 61°. Its hue sits on the warm side of the wheel. The nearest named color is Tangerine (#FF9408), ΔE 0.003 away. Black text reads best on it, at 9.43:1.
| Hue family | Oranges |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.174) |
| Temperature | warm |
| Nearest name | Tangerine (#FF9408) |
| Black text | 9.43:1 |
| White text | 2.22:1 |
Values
| HEX | #FF9311 |
| RGB | rgb(255, 147, 17) |
| HSL | hsl(33, 100%, 53%) |
| OKLCH | oklch(76.2% 0.174 60.8) |
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 #FF9311 | 2.22:1 | Fails | Lc -48.1 | Large or bold text, headings |
| Black text on #FF9311 | 9.43:1 | AAA | Lc 60.6 | Content text, not long reading |
| #FF9311 text on white | 2.22:1 | Fails | Lc 43.3 | Non-text elements, placeholder text |
| #FF9311 text on black | 9.43:1 | 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
#FFF3EA
oklch(97.1% 0.018 59.5)
-
Step 100
100
#FFE4CF
oklch(93.5% 0.041 60.2)
-
Step 200
200
#FFCEA6
oklch(88.5% 0.076 60.8)
-
Step 300
300 (this color)
#FF9311
oklch(76.2% 0.174 60.8)
-
Step 400
400
#E88400
oklch(70.7% 0.164 60.9)
-
Step 500
500
#C77000
oklch(63% 0.147 60.7)
-
Step 600
600
#A85E00
oklch(55.6% 0.129 60.9)
-
Step 700
700
#8E4E00
oklch(49% 0.114 60.5)
-
Step 800
800
#754000
oklch(42.8% 0.099 61.2)
-
Step 900
900
#623400
oklch(37.6% 0.088 60.4)
-
Step 950
950
#3C1E00
oklch(27.1% 0.063 61.1)
#FF9311 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) | #B49F00 | 0.127 |
| Deuteranopia (no green cones) | #CEB812 | 0.115 |
| Tritanopia (no blue cones) | #FF7A7E | 0.121 |
| Achromatopsia (no color) | #AEAEAE | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #FF9311
#FF9311
oklch(76.2% 0.174 60.8)
- #56BCFF
#56BCFF
oklch(76.3% 0.135 240.6)
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 #FF9311, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tangerine #FF9408 ΔE 0.003
- Dark Orange #FF8C00 ΔE 0.015
- Pastel Orange #FF964F ΔE 0.033
- Gamboge #EE9B00 ΔE 0.034
- Faded Orange #F0944D ΔE 0.039
- Mango #FFA62B ΔE 0.042
- Orange #FFA500 ΔE 0.043
- Orange Wheel #F77F00 ΔE 0.048
Use #FF9311 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.