#FF0040
Closest named color: Neon Red (#FF073A). oklch(63.2% 0.254 20.8), rgb(255, 0, 64).
Aa
Black text reads best on this color (5.32:1).
About this color
#FF0040 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.254 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Neon Red (#FF073A), ΔE 0.007 away. Black text reads best on it, at 5.32:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.254) |
| Temperature | warm |
| Nearest name | Neon Red (#FF073A) |
| Black text | 5.32:1 |
| White text | 3.94:1 |
Values
| HEX | #FF0040 |
| RGB | rgb(255, 0, 64) |
| HSL | hsl(345, 100%, 50%) |
| OKLCH | oklch(63.2% 0.254 20.8) |
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 #FF0040 | 3.94:1 | AA large text | Lc -69.3 | Content text, not long reading |
| Black text on #FF0040 | 5.32:1 | AA | Lc 40.3 | Non-text elements, placeholder text |
| #FF0040 text on white | 3.94:1 | AA large text | Lc 63.8 | Content text, not long reading |
| #FF0040 text on black | 5.32:1 | AA | Lc -37.9 | 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
#FFF2F1
oklch(97.1% 0.014 22.8)
-
Step 100
100
#FFE2E1
oklch(93.6% 0.032 20.1)
-
Step 200
200
#FFCAC8
oklch(88.5% 0.061 20.9)
-
Step 300
300
#FFA4A2
oklch(80.9% 0.108 21.1)
-
Step 400
400
#FF676D
oklch(70.7% 0.185 20.8)
-
Step 500
500 (this color)
#FF0040
oklch(63.2% 0.254 20.8)
-
Step 600
600
#D70034
oklch(55.6% 0.223 21)
-
Step 700
700
#B6002B
oklch(49.1% 0.197 20.8)
-
Step 800
800
#970022
oklch(42.8% 0.172 20.8)
-
Step 900
900
#7F001B
oklch(37.7% 0.152 20.8)
-
Step 950
950
#4E020E
oklch(27% 0.106 20.7)
#FF0040 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) | #69613F | 0.284 |
| Deuteranopia (no green cones) | #A19137 | 0.257 |
| Tritanopia (no blue cones) | #FF0027 | 0.022 |
| Achromatopsia (no color) | #808080 | 0.256 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #FF0040
#FF0040
oklch(63.2% 0.254 20.8)
- #009DA4
#009DA4
oklch(63.3% 0.108 200.4)
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 #FF0040, closest first.
No curated palette has a color within ΔE 0.04 of #FF0040.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Red #FF073A ΔE 0.007
- Pinky Red #FC2647 ΔE 0.015
- Strawberry #FB2943 ΔE 0.018
- Red Pink #FA2A55 ΔE 0.025
- Cherry Red #F7022A ΔE 0.025
- Pink Red #F5054F ΔE 0.027
- Red Pantone #EF233C ΔE 0.031
- Bright Red #FF000D ΔE 0.034
Use #FF0040 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.