#EF391A
Closest named color: Vermillion (#F4320C). oklch(62.3% 0.221 32), rgb(239, 57, 26).
Aa
Black text reads best on this color (5.27:1).
About this color
#EF391A is a medium-light, vivid red. In OKLCH its lightness is 62%, its chroma 0.221 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.010 away. Black text reads best on it, at 5.27:1.
| Hue family | Reds |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.221) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.27:1 |
| White text | 3.98:1 |
Values
| HEX | #EF391A |
| RGB | rgb(239, 57, 26) |
| HSL | hsl(9, 87%, 52%) |
| OKLCH | oklch(62.3% 0.221 32) |
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 #EF391A | 3.98:1 | AA large text | Lc -71.0 | Content text, not long reading |
| Black text on #EF391A | 5.27:1 | AA | Lc 38.6 | Non-text elements, placeholder text |
| #EF391A text on white | 3.98:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #EF391A text on black | 5.27:1 | AA | Lc -36.2 | 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
#FFF2EF
oklch(97.1% 0.015 33.1)
-
Step 100
100
#FEE3DD
oklch(93.6% 0.031 32.6)
-
Step 200
200
#FECBC1
oklch(88.4% 0.06 31.1)
-
Step 300
300
#FFA694
oklch(80.9% 0.109 32)
-
Step 400
400
#F97057
oklch(70.6% 0.173 32.1)
-
Step 500
500 (this color)
#EF391A
oklch(62.3% 0.221 32)
-
Step 600
600
#D22400
oklch(55.6% 0.21 32)
-
Step 700
700
#B21D00
oklch(49.1% 0.186 32)
-
Step 800
800
#931600
oklch(42.7% 0.162 32)
-
Step 900
900
#7C1100
oklch(37.7% 0.143 32.1)
-
Step 950
950
#490E05
oklch(27% 0.09 32.2)
#EF391A 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) | #736611 | 0.236 |
| Deuteranopia (no green cones) | #A08E05 | 0.213 |
| Tritanopia (no blue cones) | #FF0035 | 0.050 |
| Achromatopsia (no color) | #7F7F7F | 0.223 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF391A
#EF391A
oklch(62.3% 0.221 32)
- #0098AD
#0098AD
oklch(62.4% 0.109 211.8)
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 #EF391A, closest first.
No curated palette has a color within ΔE 0.04 of #EF391A.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.010
- Tomato Red #EC2D01 ΔE 0.016
- Orangey Red #FA4224 ΔE 0.027
- Red Orange #FD3C06 ΔE 0.029
- Orangered #FE420F ΔE 0.035
- Fire Engine Red #FE0002 ΔE 0.037
- Red #FF0000 ΔE 0.038
- Bright Red #FF000D ΔE 0.039
Use #EF391A 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.