#E53321
Closest named color: Tomato Red (#EC2D01). oklch(60.2% 0.216 30.2), rgb(229, 51, 33).
Aa
Black text reads best on this color (4.82:1).
About this color
#E53321 is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.216 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Tomato Red (#EC2D01), ΔE 0.016 away. Black text reads best on it, at 4.82:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.216) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 4.82:1 |
| White text | 4.35:1 |
Values
| HEX | #E53321 |
| RGB | rgb(229, 51, 33) |
| HSL | hsl(6, 79%, 51%) |
| OKLCH | oklch(60.2% 0.216 30.2) |
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 #E53321 | 4.35:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #E53321 | 4.82:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #E53321 text on white | 4.35:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #E53321 text on black | 4.82:1 | AA | Lc -33.2 | 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
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FEE3DE
oklch(93.6% 0.031 30.2)
-
Step 200
200
#FECCC2
oklch(88.6% 0.059 31.3)
-
Step 300
300
#FDA798
oklch(80.9% 0.105 30.3)
-
Step 400
400
#F8715E
oklch(70.7% 0.169 30)
-
Step 500
500 (this color)
#E53321
oklch(60.2% 0.216 30.2)
-
Step 600
600
#D71300
oklch(55.7% 0.222 30.2)
-
Step 700
700
#B60E00
oklch(49.2% 0.196 30.2)
-
Step 800
800
#960A00
oklch(42.6% 0.17 30.2)
-
Step 900
900
#7B1208
oklch(37.6% 0.14 30.2)
-
Step 950
950
#490E08
oklch(27% 0.09 29.9)
#E53321 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) | #6C601C | 0.232 |
| Deuteranopia (no green cones) | #988714 | 0.209 |
| Tritanopia (no blue cones) | #FD0031 | 0.052 |
| Achromatopsia (no color) | #797979 | 0.217 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E53321
#E53321
oklch(60.2% 0.216 30.2)
- #0091A3
#0091A3
oklch(60.2% 0.104 210.1)
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 #E53321, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato Red #EC2D01 ΔE 0.016
- Vermillion #F4320C ΔE 0.030
- Imperial Red #E63946 ΔE 0.032
- Red Pantone #EF233C ΔE 0.035
- Cherry Red #F7022A ΔE 0.042
- Deep Orange #DC4D01 ΔE 0.044
- Fire Engine Red #FE0002 ΔE 0.048
- Crimson #DC143C ΔE 0.050
Use #E53321 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.