#E55133
Closest named color: Deep Orange (#DC4D01). oklch(63.2% 0.189 33.3), rgb(229, 81, 51).
Aa
Black text reads best on this color (5.55:1).
About this color
#E55133 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.189 and its hue 33°. 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 5.55:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.189) |
| Temperature | warm |
| Nearest name | Deep Orange (#DC4D01) |
| Black text | 5.55:1 |
| White text | 3.77:1 |
Values
| HEX | #E55133 |
| RGB | rgb(229, 81, 51) |
| HSL | hsl(10, 77%, 55%) |
| OKLCH | oklch(63.2% 0.189 33.3) |
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 #E55133 | 3.77:1 | AA large text | Lc -69.8 | Content text, not long reading |
| Black text on #E55133 | 5.55:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #E55133 text on white | 3.77:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #E55133 text on black | 5.55:1 | AA | Lc -37.4 | 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
#FEF3F0
oklch(97.2% 0.013 35.7)
-
Step 100
100
#FBE4DE
oklch(93.6% 0.027 35)
-
Step 200
200
#F9CEC4
oklch(88.6% 0.051 33.3)
-
Step 300
300
#F6AB9A
oklch(80.9% 0.092 33.3)
-
Step 400
400
#EE7A61
oklch(70.7% 0.148 33.4)
-
Step 500
500 (this color)
#E55133
oklch(63.2% 0.189 33.3)
-
Step 600
600
#CF2C00
oklch(55.6% 0.203 33.4)
-
Step 700
700
#AF2300
oklch(49% 0.18 33.3)
-
Step 800
800
#911B00
oklch(42.6% 0.157 33.2)
-
Step 900
900
#751F0D
oklch(37.7% 0.123 33.4)
-
Step 950
950
#45140A
oklch(27% 0.078 33.4)
#E55133 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) | #7B6F2E | 0.196 |
| Deuteranopia (no green cones) | #A08F2D | 0.178 |
| Tritanopia (no blue cones) | #FC274B | 0.071 |
| Achromatopsia (no color) | #838383 | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E55133
#E55133
oklch(63.2% 0.189 33.3)
- #009BB2
#009BB2
oklch(63.3% 0.111 213)
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 #E55133, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Orange #DC4D01 ΔE 0.032
- Pale Red #D9544D ΔE 0.032
- Pastel Red #DB5856 ΔE 0.038
- Orangey Red #FA4224 ΔE 0.040
- Vermillion #F4320C ΔE 0.043
- Tomato Red #EC2D01 ΔE 0.045
- Imperial Red #E63946 ΔE 0.047
- Orangered #FE420F ΔE 0.047
Use #E55133 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.