#E55121
Closest named color: Deep Orange (#DC4D01). oklch(63.1% 0.192 37), rgb(229, 81, 33).
Aa
Black text reads best on this color (5.53:1).
About this color
#E55121 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.192 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Deep Orange (#DC4D01), ΔE 0.023 away. Black text reads best on it, at 5.53:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.192) |
| Temperature | warm |
| Nearest name | Deep Orange (#DC4D01) |
| Black text | 5.53:1 |
| White text | 3.79:1 |
Values
| HEX | #E55121 |
| RGB | rgb(229, 81, 33) |
| HSL | hsl(15, 79%, 51%) |
| OKLCH | oklch(63.1% 0.192 37) |
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 #E55121 | 3.79:1 | AA large text | Lc -69.9 | Content text, not long reading |
| Black text on #E55121 | 5.53:1 | AA | Lc 39.7 | Non-text elements, placeholder text |
| #E55121 text on white | 3.79:1 | AA large text | Lc 64.4 | Content text, not long reading |
| #E55121 text on black | 5.53:1 | AA | Lc -37.3 | 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
#FBE4DD
oklch(93.6% 0.027 37.6)
-
Step 200
200
#F9CEC1
oklch(88.5% 0.052 37.5)
-
Step 300
300
#F6AB95
oklch(80.8% 0.094 37)
-
Step 400
400
#EE7B59
oklch(70.7% 0.15 37.3)
-
Step 500
500 (this color)
#E55121
oklch(63.1% 0.192 37)
-
Step 600
600
#C83B00
oklch(55.7% 0.186 37.1)
-
Step 700
700
#A93000
oklch(49.1% 0.164 37)
-
Step 800
800
#8C2600
oklch(42.7% 0.143 37)
-
Step 900
900
#751F01
oklch(37.6% 0.125 37)
-
Step 950
950
#451405
oklch(27% 0.079 37.5)
#E55121 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) | #7C6E18 | 0.196 |
| Deuteranopia (no green cones) | #A18F18 | 0.176 |
| Tritanopia (no blue cones) | #FC2448 | 0.079 |
| Achromatopsia (no color) | #838383 | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E55121
#E55121
oklch(63.1% 0.192 37)
- #0099B6
#0099B6
oklch(63% 0.113 217.6)
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 #E55121, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Orange #DC4D01 ΔE 0.023
- Orangey Red #FA4224 ΔE 0.042
- Pale Red #D9544D ΔE 0.043
- Vermillion #F4320C ΔE 0.043
- Tomato Red #EC2D01 ΔE 0.045
- Orange Pant #FB5607 ΔE 0.045
- Blood Orange #FE4B03 ΔE 0.046
- Orangered #FE420F ΔE 0.047
Use #E55121 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.