#E9551B
Closest named color: Deep Orange (#DC4D01). oklch(64.1% 0.194 38.8), rgb(233, 85, 27).
Aa
Black text reads best on this color (5.77:1).
About this color
#E9551B is a medium-light, vivid red. In OKLCH its lightness is 64%, its chroma 0.194 and its hue 39°. Its hue sits on the warm side of the wheel. The nearest named color is Deep Orange (#DC4D01), ΔE 0.032 away. Black text reads best on it, at 5.77:1.
| Hue family | Reds |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.194) |
| Temperature | warm |
| Nearest name | Deep Orange (#DC4D01) |
| Black text | 5.77:1 |
| White text | 3.63:1 |
Values
| HEX | #E9551B |
| RGB | rgb(233, 85, 27) |
| HSL | hsl(17, 82%, 51%) |
| OKLCH | oklch(64.1% 0.194 38.8) |
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 #E9551B | 3.63:1 | AA large text | Lc -68.3 | Content text, not long reading |
| Black text on #E9551B | 5.77:1 | AA | Lc 41.2 | Non-text elements, placeholder text |
| #E9551B text on white | 3.63:1 | AA large text | Lc 62.9 | Content text, not long reading |
| #E9551B text on black | 5.77:1 | AA | Lc -38.8 | 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 500.
-
Step 50
50
#FEF3EF
oklch(97.2% 0.013 41.2)
-
Step 100
100
#FBE4DD
oklch(93.6% 0.027 37.6)
-
Step 200
200
#F9CEC0
oklch(88.5% 0.053 38.8)
-
Step 300
300
#F6AC93
oklch(80.9% 0.094 39.4)
-
Step 400
400
#EE7B55
oklch(70.7% 0.151 38.8)
-
Step 500
500 (this color)
#E9551B
oklch(64.1% 0.194 38.8)
-
Step 600
600
#C53F00
oklch(55.6% 0.18 38.6)
-
Step 700
700
#A63400
oklch(49% 0.158 38.7)
-
Step 800
800
#8A2A00
oklch(42.8% 0.138 38.8)
-
Step 900
900
#742200
oklch(37.8% 0.121 38.9)
-
Step 950
950
#451404
oklch(26.9% 0.08 38.3)
#E9551B 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) | #80710D | 0.195 |
| Deuteranopia (no green cones) | #A5930F | 0.176 |
| Tritanopia (no blue cones) | #FF294B | 0.084 |
| Achromatopsia (no color) | #868686 | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E9551B
#E9551B
oklch(64.1% 0.194 38.8)
- #009CBC
#009CBC
oklch(64% 0.116 219.3)
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 #E9551B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Orange #DC4D01 ΔE 0.032
- Orange Pant #FB5607 ΔE 0.035
- Blood Orange #FE4B03 ΔE 0.038
- Orangey Red #FA4224 ΔE 0.040
- Orange Red #FF4500 ΔE 0.042
- Orangered #FE420F ΔE 0.042
- Red Orange #FD3C06 ΔE 0.044
- Bright Orange #FF5B00 ΔE 0.046
Use #E9551B 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.