#F43131
Closest named color: Vermillion (#F4320C). oklch(62.8% 0.229 26.9), rgb(244, 49, 49).
Aa
Black text reads best on this color (5.33:1).
About this color
#F43131 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.229 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.021 away. Black text reads best on it, at 5.33:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.229) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.33:1 |
| White text | 3.93:1 |
Values
| HEX | #F43131 |
| RGB | rgb(244, 49, 49) |
| HSL | hsl(0, 90%, 57%) |
| OKLCH | oklch(62.8% 0.229 26.9) |
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 #F43131 | 3.93:1 | AA large text | Lc -70.4 | Content text, not long reading |
| Black text on #F43131 | 5.33:1 | AA | Lc 39.1 | Non-text elements, placeholder text |
| #F43131 text on white | 3.93:1 | AA large text | Lc 64.9 | Content text, not long reading |
| #F43131 text on black | 5.33:1 | AA | Lc -36.7 | 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
#FFE2DE
oklch(93.5% 0.033 27.1)
-
Step 200
200
#FFCBC4
oklch(88.6% 0.06 27.2)
-
Step 300
300
#FFA59B
oklch(80.9% 0.108 26.6)
-
Step 400
400
#FC6C61
oklch(70.7% 0.178 26.9)
-
Step 500
500 (this color)
#F43131
oklch(62.8% 0.229 26.9)
-
Step 600
600
#D90018
oklch(55.7% 0.227 26.9)
-
Step 700
700
#B70012
oklch(49% 0.2 27)
-
Step 800
800
#98000D
oklch(42.8% 0.174 27)
-
Step 900
900
#7E060C
oklch(37.6% 0.149 27)
-
Step 950
950
#4B0B0A
oklch(27.1% 0.095 26.9)
#F43131 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) | #71652E | 0.248 |
| Deuteranopia (no green cones) | #A08F27 | 0.225 |
| Tritanopia (no blue cones) | #FF0034 | 0.030 |
| Achromatopsia (no color) | #808080 | 0.230 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #F43131
#F43131
oklch(62.8% 0.229 26.9)
- #009AA9
#009AA9
oklch(62.7% 0.108 206.9)
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 #F43131, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.021
- Red Pantone #EF233C ΔE 0.024
- Strawberry #FB2943 ΔE 0.024
- Cherry Red #F7022A ΔE 0.025
- Tomato Red #EC2D01 ΔE 0.029
- Pinky Red #FC2647 ΔE 0.029
- Bright Red #FF000D ΔE 0.029
- Fire Engine Red #FE0002 ΔE 0.030
Use #F43131 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.