#F3372B
Closest named color: Vermillion (#F4320C). oklch(63% 0.225 29), rgb(243, 55, 43).
Aa
Black text reads best on this color (5.39:1).
About this color
#F3372B is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.225 and its hue 29°. 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 5.39:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.225) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.39:1 |
| White text | 3.89:1 |
Values
| HEX | #F3372B |
| RGB | rgb(243, 55, 43) |
| HSL | hsl(4, 89%, 56%) |
| OKLCH | oklch(63% 0.225 29) |
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 #F3372B | 3.89:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #F3372B | 5.39:1 | AA | Lc 39.4 | Non-text elements, placeholder text |
| #F3372B text on white | 3.89:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #F3372B text on black | 5.39:1 | 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
#FFE3DE
oklch(93.7% 0.032 29.8)
-
Step 200
200
#FFCBC2
oklch(88.5% 0.061 29.7)
-
Step 300
300
#FFA698
oklch(81% 0.108 29.4)
-
Step 400
400
#FB6E5D
oklch(70.7% 0.176 29.1)
-
Step 500
500 (this color)
#F3372B
oklch(63% 0.225 29)
-
Step 600
600
#D90003
oklch(55.6% 0.228 29)
-
Step 700
700
#B80002
oklch(49.2% 0.202 29)
-
Step 800
800
#980002
oklch(42.7% 0.175 28.9)
-
Step 900
900
#7D0B07
oklch(37.6% 0.146 29)
-
Step 950
950
#4A0C08
oklch(27% 0.093 28.8)
#F3372B 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) | #736727 | 0.242 |
| Deuteranopia (no green cones) | #A19020 | 0.220 |
| Tritanopia (no blue cones) | #FF0037 | 0.040 |
| Achromatopsia (no color) | #818181 | 0.226 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #F3372B
#F3372B
oklch(63% 0.225 29)
- #009BAC
#009BAC
oklch(63.1% 0.109 208.4)
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 #F3372B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.015
- Orangey Red #FA4224 ΔE 0.023
- Tomato Red #EC2D01 ΔE 0.025
- Red Orange #FD3C06 ΔE 0.028
- Red Pantone #EF233C ΔE 0.032
- Strawberry #FB2943 ΔE 0.032
- Fire Engine Red #FE0002 ΔE 0.033
- Bright Red #FF000D ΔE 0.033
Use #F3372B 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.