#F33B16
Closest named color: Vermillion (#F4320C). oklch(63.2% 0.224 32.7), rgb(243, 59, 22).
Aa
Black text reads best on this color (5.44:1).
About this color
#F33B16 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.224 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.009 away. Black text reads best on it, at 5.44:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.224) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.44:1 |
| White text | 3.85:1 |
Values
| HEX | #F33B16 |
| RGB | rgb(243, 59, 22) |
| HSL | hsl(10, 90%, 52%) |
| OKLCH | oklch(63.2% 0.224 32.7) |
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 #F33B16 | 3.85:1 | AA large text | Lc -69.8 | Content text, not long reading |
| Black text on #F33B16 | 5.44:1 | AA | Lc 39.7 | Non-text elements, placeholder text |
| #F33B16 text on white | 3.85:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #F33B16 text on black | 5.44:1 | AA | Lc -37.3 | 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
#FFF2EF
oklch(97.1% 0.015 33.1)
-
Step 100
100
#FEE3DD
oklch(93.6% 0.031 32.6)
-
Step 200
200
#FFCBC0
oklch(88.5% 0.061 32.1)
-
Step 300
300
#FFA693
oklch(80.9% 0.11 32.7)
-
Step 400
400
#FA7055
oklch(70.7% 0.175 32.8)
-
Step 500
500 (this color)
#F33B16
oklch(63.2% 0.224 32.7)
-
Step 600
600
#D12800
oklch(55.6% 0.207 32.6)
-
Step 700
700
#B12000
oklch(49.1% 0.183 32.6)
-
Step 800
800
#921900
oklch(42.7% 0.159 32.7)
-
Step 900
900
#7B1300
oklch(37.7% 0.14 32.6)
-
Step 950
950
#4A0D04
oklch(27% 0.093 32.2)
#F33B16 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) | #766809 | 0.238 |
| Deuteranopia (no green cones) | #A39000 | 0.213 |
| Tritanopia (no blue cones) | #FF0036 | 0.051 |
| Achromatopsia (no color) | #828282 | 0.225 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #F33B16
#F33B16
oklch(63.2% 0.224 32.7)
- #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 #F33B16, closest first.
No curated palette has a color within ΔE 0.04 of #F33B16.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.009
- Orangey Red #FA4224 ΔE 0.019
- Red Orange #FD3C06 ΔE 0.020
- Tomato Red #EC2D01 ΔE 0.024
- Orangered #FE420F ΔE 0.026
- Orange Red #FF4500 ΔE 0.031
- Blood Orange #FE4B03 ΔE 0.036
- Fire Engine Red #FE0002 ΔE 0.036
Use #F33B16 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.