#EF3F2F
Closest named color: Vermillion (#F4320C). oklch(63% 0.215 29.6), rgb(239, 63, 47).
Aa
Black text reads best on this color (5.42:1).
About this color
#EF3F2F is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.215 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.020 away. Black text reads best on it, at 5.42:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.215) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.42:1 |
| White text | 3.87:1 |
Values
| HEX | #EF3F2F |
| RGB | rgb(239, 63, 47) |
| HSL | hsl(5, 86%, 56%) |
| OKLCH | oklch(63% 0.215 29.6) |
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 #EF3F2F | 3.87:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #EF3F2F | 5.42:1 | AA | Lc 39.4 | Non-text elements, placeholder text |
| #EF3F2F text on white | 3.87:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #EF3F2F text on black | 5.42:1 | AA | Lc -37.0 | 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
#FDCCC3
oklch(88.5% 0.057 30.3)
-
Step 300
300
#FDA799
oklch(80.9% 0.105 29.7)
-
Step 400
400
#F77160
oklch(70.6% 0.168 29.3)
-
Step 500
500 (this color)
#EF3F2F
oklch(63% 0.215 29.6)
-
Step 600
600
#D80800
oklch(55.6% 0.226 29.6)
-
Step 700
700
#B70500
oklch(49.1% 0.199 29.6)
-
Step 800
800
#970400
oklch(42.6% 0.173 29.6)
-
Step 900
900
#7B120A
oklch(37.7% 0.14 29.7)
-
Step 950
950
#490E09
oklch(27% 0.09 29.2)
#EF3F2F 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) | #75692B | 0.229 |
| Deuteranopia (no green cones) | #A08F26 | 0.208 |
| Tritanopia (no blue cones) | #FF003D | 0.052 |
| Achromatopsia (no color) | #818181 | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF3F2F
#EF3F2F
oklch(63% 0.215 29.6)
- #009AAD
#009AAD
oklch(62.9% 0.109 210.1)
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 #EF3F2F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.020
- Orangey Red #FA4224 ΔE 0.024
- Tomato Red #EC2D01 ΔE 0.027
- Red Orange #FD3C06 ΔE 0.031
- Imperial Red #E63946 ΔE 0.033
- Orangered #FE420F ΔE 0.035
- Red Pantone #EF233C ΔE 0.036
- Strawberry #FB2943 ΔE 0.038
Use #EF3F2F 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.