#508DE0
Closest named color: Dark Sky Blue (#448EE4). oklch(64.1% 0.14 256.6), rgb(80, 141, 224).
Aa
Black text reads best on this color (6.22:1).
About this color
#508DE0 is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.140 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.011 away. Black text reads best on it, at 6.22:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.22:1 |
| White text | 3.37:1 |
Values
| HEX | #508DE0 |
| RGB | rgb(80, 141, 224) |
| HSL | hsl(215, 70%, 60%) |
| OKLCH | oklch(64.1% 0.14 256.6) |
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 #508DE0 | 3.37:1 | AA large text | Lc -66.4 | Content text, not long reading |
| Black text on #508DE0 | 6.22:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #508DE0 text on white | 3.37:1 | AA large text | Lc 60.9 | Content text, not long reading |
| #508DE0 text on black | 6.22:1 | AA | Lc -40.8 | 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
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A4C3ED
oklch(80.9% 0.069 256.1)
-
Step 400
400
#73A3E4
oklch(70.8% 0.109 256.2)
-
Step 500
500 (this color)
#508DE0
oklch(64.1% 0.14 256.6)
-
Step 600
600
#2F72CA
oklch(55.6% 0.152 256.6)
-
Step 700
700
#215FAF
oklch(49.1% 0.142 256.6)
-
Step 800
800
#1E4E8E
oklch(42.7% 0.118 256.8)
-
Step 900
900
#1E4171
oklch(37.6% 0.092 256.9)
-
Step 950
950
#122742
oklch(27.1% 0.057 255.5)
#508DE0 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) | #6993E3 | 0.032 |
| Deuteranopia (no green cones) | #5486DE | 0.018 |
| Tritanopia (no blue cones) | #00A0AC | 0.114 |
| Achromatopsia (no color) | #8C8C8C | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #508DE0
#508DE0
oklch(64.1% 0.14 256.6)
- #BA7F00
#BA7F00
oklch(64% 0.134 76.2)
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 #508DE0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.011
- Chefchaouen Blue #4895EF ΔE 0.028
- Soft Blue #6488EA ΔE 0.029
- Cornflower Blue #6495ED ΔE 0.036
- Dodger Blue #1E90FF ΔE 0.052
- Water Blue #0E87CC ΔE 0.054
- Faded Blue #658CBB ΔE 0.058
- Cool Blue #4984B8 ΔE 0.063
Use #508DE0 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.