#EF4324
Closest named color: Vermillion (#F4320C). oklch(63.3% 0.213 32.4), rgb(239, 67, 36).
Aa
Black text reads best on this color (5.49:1).
About this color
#EF4324 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.213 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.019 away. Black text reads best on it, at 5.49:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.213) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.49:1 |
| White text | 3.81:1 |
Values
| HEX | #EF4324 |
| RGB | rgb(239, 67, 36) |
| HSL | hsl(9, 86%, 54%) |
| OKLCH | oklch(63.3% 0.213 32.4) |
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 #EF4324 | 3.81:1 | AA large text | Lc -69.8 | Content text, not long reading |
| Black text on #EF4324 | 5.49:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #EF4324 text on white | 3.81:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #EF4324 text on black | 5.49:1 | AA | Lc -37.4 | 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
#FDE3DD
oklch(93.5% 0.03 33.1)
-
Step 200
200
#FDCCC1
oklch(88.5% 0.058 32.8)
-
Step 300
300
#FCA896
oklch(80.9% 0.103 32.6)
-
Step 400
400
#F6735A
oklch(70.7% 0.166 32.4)
-
Step 500
500 (this color)
#EF4324
oklch(63.3% 0.213 32.4)
-
Step 600
600
#D12700
oklch(55.6% 0.208 32.5)
-
Step 700
700
#B11F00
oklch(49.1% 0.184 32.4)
-
Step 800
800
#921800
oklch(42.6% 0.159 32.5)
-
Step 900
900
#7B1402
oklch(37.8% 0.14 32.3)
-
Step 950
950
#480F06
oklch(26.9% 0.088 32.1)
#EF4324 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) | #786A1D | 0.224 |
| Deuteranopia (no green cones) | #A29018 | 0.203 |
| Tritanopia (no blue cones) | #FF003E | 0.061 |
| Achromatopsia (no color) | #828282 | 0.215 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF4324
#EF4324
oklch(63.3% 0.213 32.4)
- #009BB1
#009BB1
oklch(63.3% 0.11 212.3)
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 #EF4324, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.019
- Orangey Red #FA4224 ΔE 0.021
- Red Orange #FD3C06 ΔE 0.027
- Tomato Red #EC2D01 ΔE 0.028
- Orangered #FE420F ΔE 0.030
- Orange Red #FF4500 ΔE 0.034
- Blood Orange #FE4B03 ΔE 0.037
- Deep Orange #DC4D01 ΔE 0.042
Use #EF4324 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.