#EF3C19
Closest named color: Vermillion (#F4320C). oklch(62.6% 0.219 32.7), rgb(239, 60, 25).
Aa
Black text reads best on this color (5.33:1).
About this color
#EF3C19 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.219 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.012 away. Black text reads best on it, at 5.33:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.219) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.33:1 |
| White text | 3.93:1 |
Values
| HEX | #EF3C19 |
| RGB | rgb(239, 60, 25) |
| HSL | hsl(10, 87%, 52%) |
| OKLCH | oklch(62.6% 0.219 32.7) |
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 #EF3C19 | 3.93:1 | AA large text | Lc -70.7 | Content text, not long reading |
| Black text on #EF3C19 | 5.33:1 | AA | Lc 38.9 | Non-text elements, placeholder text |
| #EF3C19 text on white | 3.93:1 | AA large text | Lc 65.2 | Content text, not long reading |
| #EF3C19 text on black | 5.33:1 | AA | Lc -36.5 | 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
#FFF2EF
oklch(97.1% 0.015 33.1)
-
Step 100
100
#FEE3DD
oklch(93.6% 0.031 32.6)
-
Step 200
200
#FECCC0
oklch(88.6% 0.059 33.8)
-
Step 300
300
#FEA794
oklch(80.9% 0.107 32.9)
-
Step 400
400
#F97157
oklch(70.8% 0.172 32.5)
-
Step 500
500 (this color)
#EF3C19
oklch(62.6% 0.219 32.7)
-
Step 600
600
#D12800
oklch(55.6% 0.207 32.6)
-
Step 700
700
#B12000
oklch(49.1% 0.183 32.6)
-
Step 800
800
#921900
oklch(42.7% 0.159 32.7)
-
Step 900
900
#7B1300
oklch(37.7% 0.14 32.6)
-
Step 950
950
#490E04
oklch(27% 0.091 32.9)
#EF3C19 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) | #75670F | 0.232 |
| Deuteranopia (no green cones) | #A08F04 | 0.211 |
| Tritanopia (no blue cones) | #FF0037 | 0.054 |
| Achromatopsia (no color) | #808080 | 0.221 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF3C19
#EF3C19
oklch(62.6% 0.219 32.7)
- #0099AF
#0099AF
oklch(62.7% 0.109 212.5)
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 #EF3C19, closest first.
No curated palette has a color within ΔE 0.04 of #EF3C19.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.012
- Tomato Red #EC2D01 ΔE 0.019
- Orangey Red #FA4224 ΔE 0.025
- Red Orange #FD3C06 ΔE 0.028
- Orangered #FE420F ΔE 0.033
- Orange Red #FF4500 ΔE 0.037
- Fire Engine Red #FE0002 ΔE 0.040
- Red #FF0000 ΔE 0.041
Use #EF3C19 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.