#FF5B00
Named color: Bright Orange. oklch(68.3% 0.213 40.3), rgb(255, 91, 0).
Aa
Black text reads best on this color (6.74:1).
About this color
#FF5B00 is a medium-light, vivid orange. In OKLCH its lightness is 68%, its chroma 0.213 and its hue 40°. Its hue sits on the warm side of the wheel. It is the named color Bright Orange. Black text reads best on it, at 6.74:1.
| Hue family | Oranges |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.213) |
| Temperature | warm |
| Nearest name | Bright Orange |
| Black text | 6.74:1 |
| White text | 3.11:1 |
Values
| HEX | #FF5B00 |
| RGB | rgb(255, 91, 0) |
| HSL | hsl(21, 100%, 50%) |
| OKLCH | oklch(68.3% 0.213 40.3) |
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 #FF5B00 | 3.11:1 | AA large text | Lc -62.3 | Content text, not long reading |
| Black text on #FF5B00 | 6.74:1 | AA | Lc 47.1 | Large or bold text, headings |
| #FF5B00 text on white | 3.11:1 | AA large text | Lc 56.9 | Large or bold text, headings |
| #FF5B00 text on black | 6.74:1 | AA | Lc -44.9 | Non-text elements, placeholder text |
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
#FFF2EE
oklch(97% 0.015 37.9)
-
Step 100
100
#FFE3D9
oklch(93.6% 0.034 40.7)
-
Step 200
200
#FFCCBA
oklch(88.5% 0.063 40.3)
-
Step 300
300
#FFA788
oklch(80.8% 0.113 40.2)
-
Step 400
400 (this color)
#FF5B00
oklch(68.3% 0.213 40.3)
-
Step 500
500
#E65100
oklch(63.1% 0.197 40.3)
-
Step 600
600
#C24300
oklch(55.5% 0.173 40.3)
-
Step 700
700
#A43800
oklch(49.1% 0.153 40.5)
-
Step 800
800
#882C00
oklch(42.7% 0.134 40.1)
-
Step 900
900
#722400
oklch(37.7% 0.117 40.3)
-
Step 950
950
#461300
oklch(26.9% 0.084 40.5)
#FF5B00 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) | #8C7B00 | 0.210 |
| Deuteranopia (no green cones) | #B4A000 | 0.190 |
| Tritanopia (no blue cones) | #FF264E | 0.096 |
| Achromatopsia (no color) | #929292 | 0.214 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #FF5B00
#FF5B00
oklch(68.3% 0.213 40.3)
- #00AACE
#00AACE
oklch(68.3% 0.124 220.1)
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 #FF5B00, closest first.
No curated palette has a color within ΔE 0.04 of #FF5B00.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Orange Pant #FB5607 ΔE 0.013
- Blood Orange #FE4B03 ΔE 0.026
- Orange Red #FF4500 ΔE 0.034
- Tomato #FF6347 ΔE 0.036
- Orangered #FE420F ΔE 0.040
- Orangey Red #FA4224 ΔE 0.047
- Red Orange #FD3C06 ΔE 0.047
- Pinkish Orange #FF724C ΔE 0.049
Use #FF5B00 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.