#F53331
Closest named color: Vermillion (#F4320C). oklch(63.1% 0.228 27.2), rgb(245, 51, 49).
Aa
Black text reads best on this color (5.40:1).
About this color
#F53331 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.228 and its hue 27°. 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 5.40:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.228) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.40:1 |
| White text | 3.88:1 |
Values
| HEX | #F53331 |
| RGB | rgb(245, 51, 49) |
| HSL | hsl(1, 91%, 58%) |
| OKLCH | oklch(63.1% 0.228 27.2) |
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 #F53331 | 3.88:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #F53331 | 5.40:1 | AA | Lc 39.6 | Non-text elements, placeholder text |
| #F53331 text on white | 3.88:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #F53331 text on black | 5.40:1 | AA | Lc -37.2 | 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
#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
#FFA59A
oklch(80.9% 0.109 27.3)
-
Step 400
400
#FC6C60
oklch(70.7% 0.179 27.3)
-
Step 500
500 (this color)
#F53331
oklch(63.1% 0.228 27.2)
-
Step 600
600
#D90016
oklch(55.7% 0.227 27.2)
-
Step 700
700
#B70011
oklch(49% 0.2 27.1)
-
Step 800
800
#98000C
oklch(42.7% 0.174 27.2)
-
Step 900
900
#7E070C
oklch(37.7% 0.148 27.2)
-
Step 950
950
#4B0B09
oklch(27.1% 0.095 27.6)
#F53331 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) | #72662E | 0.247 |
| Deuteranopia (no green cones) | #A19027 | 0.225 |
| Tritanopia (no blue cones) | #FF0036 | 0.032 |
| Achromatopsia (no color) | #818181 | 0.230 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #F53331
#F53331
oklch(63.1% 0.228 27.2)
- #009BAB
#009BAB
oklch(63% 0.108 207.7)
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 #F53331, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.020
- Strawberry #FB2943 ΔE 0.024
- Red Pantone #EF233C ΔE 0.027
- Orangey Red #FA4224 ΔE 0.027
- Cherry Red #F7022A ΔE 0.028
- Pinky Red #FC2647 ΔE 0.029
- Bright Red #FF000D ΔE 0.030
- Fire Engine Red #FE0002 ΔE 0.030
Use #F53331 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.