#E1521F
Closest named color: Deep Orange (#DC4D01). oklch(62.5% 0.188 38), rgb(225, 82, 31).
Aa
Black text reads best on this color (5.42:1).
About this color
#E1521F is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.188 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Deep Orange (#DC4D01), ΔE 0.017 away. Black text reads best on it, at 5.42:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.188) |
| Temperature | warm |
| Nearest name | Deep Orange (#DC4D01) |
| Black text | 5.42:1 |
| White text | 3.86:1 |
Values
| HEX | #E1521F |
| RGB | rgb(225, 82, 31) |
| HSL | hsl(16, 76%, 50%) |
| OKLCH | oklch(62.5% 0.188 38) |
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 #E1521F | 3.86:1 | AA large text | Lc -70.6 | Content text, not long reading |
| Black text on #E1521F | 5.42:1 | AA | Lc 39.0 | Non-text elements, placeholder text |
| #E1521F text on white | 3.86:1 | AA large text | Lc 65.1 | Content text, not long reading |
| #E1521F text on black | 5.42:1 | AA | Lc -36.6 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#FBE4DD
oklch(93.6% 0.027 37.6)
-
Step 200
200
#F8CEC1
oklch(88.4% 0.051 37.9)
-
Step 300
300
#F5AC96
oklch(80.9% 0.092 37.5)
-
Step 400
400
#EC7C59
oklch(70.6% 0.147 38.1)
-
Step 500
500 (this color)
#E1521F
oklch(62.5% 0.188 38)
-
Step 600
600
#C63E00
oklch(55.6% 0.181 38.2)
-
Step 700
700
#A83300
oklch(49.2% 0.161 38.1)
-
Step 800
800
#8A2800
oklch(42.6% 0.139 38)
-
Step 900
900
#742101
oklch(37.7% 0.122 38.1)
-
Step 950
950
#441506
oklch(26.9% 0.077 37.9)
#E1521F 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) | #7C6D15 | 0.188 |
| Deuteranopia (no green cones) | #9F8D16 | 0.170 |
| Tritanopia (no blue cones) | #F82849 | 0.081 |
| Achromatopsia (no color) | #828282 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E1521F
#E1521F
oklch(62.5% 0.188 38)
- #0097B5
#0097B5
oklch(62.5% 0.113 218.5)
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 #E1521F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Orange #DC4D01 ΔE 0.017
- Rusty Orange #CD5909 ΔE 0.041
- Pale Red #D9544D ΔE 0.042
- Tomato Red #EC2D01 ΔE 0.048
- Vermillion #F4320C ΔE 0.049
- Pastel Red #DB5856 ΔE 0.049
- Orangey Red #FA4224 ΔE 0.049
- Terra Cotta #C9643B ΔE 0.050
Use #E1521F 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.