#538AE8
Closest named color: Dark Sky Blue (#448EE4). oklch(64% 0.153 260.4), rgb(83, 138, 232).
Aa
Black text reads best on this color (6.16:1).
About this color
#538AE8 is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.153 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.017 away. Black text reads best on it, at 6.16:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.16:1 |
| White text | 3.40:1 |
Values
| HEX | #538AE8 |
| RGB | rgb(83, 138, 232) |
| HSL | hsl(218, 76%, 62%) |
| OKLCH | oklch(64% 0.153 260.4) |
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 #538AE8 | 3.40:1 | AA large text | Lc -66.7 | Content text, not long reading |
| Black text on #538AE8 | 6.16:1 | AA | Lc 42.8 | Non-text elements, placeholder text |
| #538AE8 text on white | 3.40:1 | AA large text | Lc 61.3 | Content text, not long reading |
| #538AE8 text on black | 6.16:1 | AA | Lc -40.4 | 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 500.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF5
oklch(88.5% 0.041 260.9)
-
Step 300
300
#A5C2F2
oklch(80.9% 0.075 260.4)
-
Step 400
400
#74A1EB
oklch(70.7% 0.12 260)
-
Step 500
500 (this color)
#538AE8
oklch(64% 0.153 260.4)
-
Step 600
600
#346FD3
oklch(55.7% 0.166 260.3)
-
Step 700
700
#275CB7
oklch(49.2% 0.155 260.5)
-
Step 800
800
#214C94
oklch(42.8% 0.128 260.1)
-
Step 900
900
#204076
oklch(37.8% 0.1 260.2)
-
Step 950
950
#132645
oklch(27.1% 0.063 259.7)
#538AE8 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) | #5F93EC | 0.028 |
| Deuteranopia (no green cones) | #4985E6 | 0.018 |
| Tritanopia (no blue cones) | #009FAE | 0.125 |
| Achromatopsia (no color) | #8B8B8B | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538AE8
#538AE8
oklch(64% 0.153 260.4)
- #B58200
#B58200
oklch(64% 0.132 80.9)
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 #538AE8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.017
- Soft Blue #6488EA ΔE 0.018
- Chefchaouen Blue #4895EF ΔE 0.029
- Cornflower Blue #6495ED ΔE 0.036
- Dodger Blue #1E90FF ΔE 0.044
- Cornflower #6A79F7 ΔE 0.055
- Water Blue #0E87CC ΔE 0.063
- Clear Blue #247AFD ΔE 0.068
Use #538AE8 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.