#3581FE
Closest named color: Clear Blue (#247AFD). oklch(62.5% 0.201 260), rgb(53, 129, 254).
Aa
Black text reads best on this color (5.72:1).
About this color
#3581FE is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.201 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.022 away. Black text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.201) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.72:1 |
| White text | 3.66:1 |
Values
| HEX | #3581FE |
| RGB | rgb(53, 129, 254) |
| HSL | hsl(217, 99%, 60%) |
| OKLCH | oklch(62.5% 0.201 260) |
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 #3581FE | 3.66:1 | AA large text | Lc -69.2 | Content text, not long reading |
| Black text on #3581FE | 5.72:1 | AA | Lc 40.3 | Non-text elements, placeholder text |
| #3581FE text on white | 3.66:1 | AA large text | Lc 63.7 | Content text, not long reading |
| #3581FE text on black | 5.72:1 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C4DAFE
oklch(88.4% 0.055 260.3)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#669FFF
oklch(70.7% 0.154 260.3)
-
Step 500
500 (this color)
#3581FE
oklch(62.5% 0.201 260)
-
Step 600
600
#0D68F0
oklch(55.6% 0.219 260.1)
-
Step 700
700
#0056CF
oklch(49.1% 0.2 260)
-
Step 800
800
#0547A9
oklch(42.7% 0.169 260)
-
Step 900
900
#103D85
oklch(37.7% 0.13 259.9)
-
Step 950
950
#0B244E
oklch(26.9% 0.084 260.2)
#3581FE 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) | #338FFF | 0.035 |
| Deuteranopia (no green cones) | #007DFC | 0.024 |
| Tritanopia (no blue cones) | #009FB3 | 0.155 |
| Achromatopsia (no color) | #858585 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3581FE
#3581FE
oklch(62.5% 0.201 260)
- #B07D00
#B07D00
oklch(62.5% 0.129 79.9)
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 #3581FE, closest first.
No curated palette has a color within ΔE 0.04 of #3581FE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.022
- Dodger Blue #1E90FF ΔE 0.037
- Cornflower #6A79F7 ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.057
- Soft Blue #6488EA ΔE 0.057
- Cerulean Blue #056EEE ΔE 0.060
- Chefchaouen Blue #4895EF ΔE 0.063
- Royal Blue #4169E1 ΔE 0.070
Use #3581FE 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.