#F3644A
Closest named color: Tomato (#FF6347). oklch(68% 0.181 32.3), rgb(243, 100, 74).
Aa
Black text reads best on this color (6.73:1).
About this color
#F3644A is a medium-light, vivid red. In OKLCH its lightness is 68%, its chroma 0.181 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Tomato (#FF6347), ΔE 0.022 away. Black text reads best on it, at 6.73:1.
| Hue family | Reds |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.181) |
| Temperature | warm |
| Nearest name | Tomato (#FF6347) |
| Black text | 6.73:1 |
| White text | 3.11:1 |
Values
| HEX | #F3644A |
| RGB | rgb(243, 100, 74) |
| HSL | hsl(9, 88%, 62%) |
| OKLCH | oklch(68% 0.181 32.3) |
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 #F3644A | 3.11:1 | AA large text | Lc -62.8 | Content text, not long reading |
| Black text on #F3644A | 6.73:1 | AA | Lc 46.7 | Large or bold text, headings |
| #F3644A text on white | 3.11:1 | AA large text | Lc 57.4 | Large or bold text, headings |
| #F3644A text on black | 6.73:1 | AA | Lc -44.4 | 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 400.
-
Step 50
50
#FFF2EF
oklch(97.1% 0.015 33.1)
-
Step 100
100
#FFE3DC
oklch(93.7% 0.032 34.3)
-
Step 200
200
#FFCBC0
oklch(88.5% 0.061 32.1)
-
Step 300
300
#FFA694
oklch(80.9% 0.109 32)
-
Step 400
400 (this color)
#F3644A
oklch(68% 0.181 32.3)
-
Step 500
500
#F6340D
oklch(63.1% 0.232 32.3)
-
Step 600
600
#D22600
oklch(55.7% 0.209 32.3)
-
Step 700
700
#B11E00
oklch(49% 0.184 32.2)
-
Step 800
800
#931700
oklch(42.7% 0.161 32.2)
-
Step 900
900
#7C1200
oklch(37.8% 0.142 32.3)
-
Step 950
950
#4B0B03
oklch(27% 0.096 31.9)
#F3644A 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) | #8B7E47 | 0.185 |
| Deuteranopia (no green cones) | #AE9E46 | 0.172 |
| Tritanopia (no blue cones) | #FF445E | 0.065 |
| Achromatopsia (no color) | #929292 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #F3644A
#F3644A
oklch(68% 0.181 32.3)
- #00ABC3
#00ABC3
oklch(68% 0.119 212.2)
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 #F3644A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato #FF6347 ΔE 0.022
- Burnt Sienna #E76F51 ΔE 0.027
- Grapefruit #FD5956 ΔE 0.031
- Orange Pink #FF6F52 ΔE 0.033
- Coral Pink #FF6163 ΔE 0.038
- Pinkish Orange #FF724C ΔE 0.038
- Orange Pant #FB5607 ΔE 0.040
- Bright Orange #FF5B00 ΔE 0.042
Use #F3644A 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.