#538DFC
Closest named color: Soft Blue (#6488EA). oklch(65.9% 0.176 262), rgb(83, 141, 252).
Aa
Black text reads best on this color (6.58:1).
About this color
#538DFC is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.176 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.031 away. Black text reads best on it, at 6.58:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.58:1 |
| White text | 3.18:1 |
Values
| HEX | #538DFC |
| RGB | rgb(83, 141, 252) |
| HSL | hsl(219, 97%, 66%) |
| OKLCH | oklch(65.9% 0.176 262) |
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 #538DFC | 3.18:1 | AA large text | Lc -64.2 | Content text, not long reading |
| Black text on #538DFC | 6.58:1 | AA | Lc 45.3 | Large or bold text, headings |
| #538DFC text on white | 3.18:1 | AA large text | Lc 58.7 | Large or bold text, headings |
| #538DFC text on black | 6.58:1 | AA | Lc -43.0 | 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
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A2C1F9
oklch(80.8% 0.087 262)
-
Step 400
400
#709FF6
oklch(70.7% 0.138 261.9)
-
Step 500
500 (this color)
#538DFC
oklch(65.9% 0.176 262)
-
Step 600
600
#2E6BE1
oklch(55.7% 0.191 261.8)
-
Step 700
700
#2158C3
oklch(49% 0.177 261.9)
-
Step 800
800
#1D499E
oklch(42.8% 0.147 261.8)
-
Step 900
900
#1D3E7E
oklch(37.8% 0.115 262)
-
Step 950
950
#122549
oklch(27% 0.071 261.9)
#538DFC 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) | #5698FF | 0.029 |
| Deuteranopia (no green cones) | #3889FA | 0.026 |
| Tritanopia (no blue cones) | #00A7B8 | 0.144 |
| Achromatopsia (no color) | #909090 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538DFC
#538DFC
oklch(65.9% 0.176 262)
- #BB8800
#BB8800
oklch(65.9% 0.136 81.9)
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 #538DFC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.031
- Chefchaouen Blue #4895EF ΔE 0.032
- Dodger Blue #1E90FF ΔE 0.032
- Cornflower Blue #6495ED ΔE 0.038
- Dark Sky Blue #448EE4 ΔE 0.040
- Cornflower #6A79F7 ΔE 0.051
- Clear Blue #247AFD ΔE 0.064
- Lavender Blue #8B88F8 ΔE 0.065
Use #538DFC 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.