#F33730
Closest named color: Vermillion (#F4320C). oklch(63% 0.224 28), rgb(243, 55, 48).
Aa
Black text reads best on this color (5.40:1).
About this color
#F33730 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.224 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.018 away. Black text reads best on it, at 5.40:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.224) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.40:1 |
| White text | 3.88:1 |
Values
| HEX | #F33730 |
| RGB | rgb(243, 55, 48) |
| HSL | hsl(2, 89%, 57%) |
| OKLCH | oklch(63% 0.224 28) |
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 #F33730 | 3.88:1 | AA large text | Lc -70.1 | Content text, not long reading |
| Black text on #F33730 | 5.40:1 | AA | Lc 39.5 | Non-text elements, placeholder text |
| #F33730 text on white | 3.88:1 | AA large text | Lc 64.6 | Content text, not long reading |
| #F33730 text on black | 5.40:1 | 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
#FFE2DE
oklch(93.5% 0.033 27.1)
-
Step 200
200
#FFCBC3
oklch(88.6% 0.06 28.4)
-
Step 300
300
#FFA599
oklch(80.8% 0.109 28)
-
Step 400
400
#FB6E60
oklch(70.8% 0.175 28)
-
Step 500
500 (this color)
#F33730
oklch(63% 0.224 28)
-
Step 600
600
#D9000F
oklch(55.6% 0.227 28)
-
Step 700
700
#B8000B
oklch(49.2% 0.201 28)
-
Step 800
800
#980007
oklch(42.7% 0.175 28)
-
Step 900
900
#7D0B0B
oklch(37.7% 0.146 28)
-
Step 950
950
#4A0C09
oklch(27% 0.093 28.1)
#F33730 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) | #73672D | 0.241 |
| Deuteranopia (no green cones) | #A19026 | 0.220 |
| Tritanopia (no blue cones) | #FF0038 | 0.038 |
| Achromatopsia (no color) | #818181 | 0.226 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #F33730
#F33730
oklch(63% 0.224 28)
- #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 #F33730, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.018
- Orangey Red #FA4224 ΔE 0.025
- Tomato Red #EC2D01 ΔE 0.028
- Strawberry #FB2943 ΔE 0.028
- Red Pantone #EF233C ΔE 0.029
- Red Orange #FD3C06 ΔE 0.031
- Cherry Red #F7022A ΔE 0.032
- Imperial Red #E63946 ΔE 0.032
Use #F33730 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.