#EF3829
Closest named color: Vermillion (#F4320C). oklch(62.4% 0.22 29.5), rgb(239, 56, 41).
Aa
Black text reads best on this color (5.26:1).
About this color
#EF3829 is a medium-light, vivid red. In OKLCH its lightness is 62%, its chroma 0.220 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.015 away. Black text reads best on it, at 5.26:1.
| Hue family | Reds |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.220) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.26:1 |
| White text | 3.98:1 |
Values
| HEX | #EF3829 |
| RGB | rgb(239, 56, 41) |
| HSL | hsl(5, 86%, 55%) |
| OKLCH | oklch(62.4% 0.22 29.5) |
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 #EF3829 | 3.98:1 | AA large text | Lc -71.0 | Content text, not long reading |
| Black text on #EF3829 | 5.26:1 | AA | Lc 38.6 | Non-text elements, placeholder text |
| #EF3829 text on white | 3.98:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #EF3829 text on black | 5.26:1 | AA | Lc -36.1 | 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
#FECBC2
oklch(88.4% 0.06 29.9)
-
Step 300
300
#FFA698
oklch(81% 0.108 29.4)
-
Step 400
400
#F96F5E
oklch(70.6% 0.173 29.2)
-
Step 500
500 (this color)
#EF3829
oklch(62.4% 0.22 29.5)
-
Step 600
600
#D80600
oklch(55.5% 0.226 29.5)
-
Step 700
700
#B70400
oklch(49.1% 0.2 29.5)
-
Step 800
800
#980300
oklch(42.8% 0.174 29.5)
-
Step 900
900
#7C0E07
oklch(37.6% 0.144 29.6)
-
Step 950
950
#490D08
oklch(26.9% 0.091 29.3)
#EF3829 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) | #726625 | 0.237 |
| Deuteranopia (no green cones) | #9F8E1E | 0.215 |
| Tritanopia (no blue cones) | #FF0037 | 0.045 |
| Achromatopsia (no color) | #7F7F7F | 0.222 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF3829
#EF3829
oklch(62.4% 0.22 29.5)
- #0098AA
#0098AA
oklch(62.2% 0.107 209.5)
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 #EF3829, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.015
- Tomato Red #EC2D01 ΔE 0.020
- Orangey Red #FA4224 ΔE 0.029
- Red Pantone #EF233C ΔE 0.031
- Imperial Red #E63946 ΔE 0.032
- Red Orange #FD3C06 ΔE 0.033
- Cherry Red #F7022A ΔE 0.035
- Fire Engine Red #FE0002 ΔE 0.036
Use #EF3829 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.