#538EF1
Closest named color: Chefchaouen Blue (#4895EF). oklch(65.4% 0.161 260.1), rgb(83, 142, 241).
Aa
Black text reads best on this color (6.50:1).
About this color
#538EF1 is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.161 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.020 away. Black text reads best on it, at 6.50:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.50:1 |
| White text | 3.22:1 |
Values
| HEX | #538EF1 |
| RGB | rgb(83, 142, 241) |
| HSL | hsl(218, 85%, 64%) |
| OKLCH | oklch(65.4% 0.161 260.1) |
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 #538EF1 | 3.22:1 | AA large text | Lc -64.7 | Content text, not long reading |
| Black text on #538EF1 | 6.50:1 | AA | Lc 44.8 | Non-text elements, placeholder text |
| #538EF1 text on white | 3.22:1 | AA large text | Lc 59.2 | Large or bold text, headings |
| #538EF1 text on black | 6.50:1 | AA | Lc -42.5 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF7
oklch(88.5% 0.044 261.2)
-
Step 300
300
#A3C2F4
oklch(80.9% 0.079 259.9)
-
Step 400
400
#72A1EE
oklch(70.8% 0.124 259.9)
-
Step 500
500 (this color)
#538EF1
oklch(65.4% 0.161 260.1)
-
Step 600
600
#2F6ED7
oklch(55.6% 0.174 260.1)
-
Step 700
700
#225BBB
oklch(49.1% 0.163 260.3)
-
Step 800
800
#1E4B97
oklch(42.7% 0.134 260.3)
-
Step 900
900
#1E3F78
oklch(37.6% 0.105 260.5)
-
Step 950
950
#122646
oklch(27.1% 0.065 259.4)
#538EF1 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) | #6097F5 | 0.029 |
| Deuteranopia (no green cones) | #4888EF | 0.020 |
| Tritanopia (no blue cones) | #00A5B4 | 0.131 |
| Achromatopsia (no color) | #8F8F8F | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538EF1
#538EF1
oklch(65.4% 0.161 260.1)
- #BB8500
#BB8500
oklch(65.3% 0.135 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 #538EF1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.020
- Soft Blue #6488EA ΔE 0.022
- Dark Sky Blue #448EE4 ΔE 0.024
- Cornflower Blue #6495ED ΔE 0.028
- Dodger Blue #1E90FF ΔE 0.036
- Cornflower #6A79F7 ΔE 0.057
- Lavender Blue #8B88F8 ΔE 0.067
- Clear Blue #247AFD ΔE 0.070
Use #538EF1 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.