#508BE1
Closest named color: Dark Sky Blue (#448EE4). oklch(63.7% 0.144 257.8), rgb(80, 139, 225).
Aa
Black text reads best on this color (6.12:1).
About this color
#508BE1 is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.144 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.012 away. Black text reads best on it, at 6.12:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.12:1 |
| White text | 3.43:1 |
Values
| HEX | #508BE1 |
| RGB | rgb(80, 139, 225) |
| HSL | hsl(216, 71%, 60%) |
| OKLCH | oklch(63.7% 0.144 257.8) |
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 #508BE1 | 3.43:1 | AA large text | Lc -67.0 | Content text, not long reading |
| Black text on #508BE1 | 6.12:1 | AA | Lc 42.5 | Non-text elements, placeholder text |
| #508BE1 text on white | 3.43:1 | AA large text | Lc 61.6 | Content text, not long reading |
| #508BE1 text on black | 6.12:1 | AA | Lc -40.1 | 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
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A5C3EE
oklch(81% 0.069 257.4)
-
Step 400
400
#73A2E6
oklch(70.7% 0.112 257.6)
-
Step 500
500 (this color)
#508BE1
oklch(63.7% 0.144 257.8)
-
Step 600
600
#3171CD
oklch(55.6% 0.157 258)
-
Step 700
700
#235EB1
oklch(49% 0.146 257.8)
-
Step 800
800
#1F4D8F
oklch(42.6% 0.12 258)
-
Step 900
900
#1F4172
oklch(37.7% 0.093 257.8)
-
Step 950
950
#132643
oklch(26.9% 0.06 258.6)
#508BE1 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) | #6592E4 | 0.031 |
| Deuteranopia (no green cones) | #5084DF | 0.019 |
| Tritanopia (no blue cones) | #009FAB | 0.118 |
| Achromatopsia (no color) | #8A8A8A | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #508BE1
#508BE1
oklch(63.7% 0.144 257.8)
- #B77F00
#B77F00
oklch(63.7% 0.133 77.7)
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 #508BE1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.012
- Soft Blue #6488EA ΔE 0.026
- Chefchaouen Blue #4895EF ΔE 0.030
- Cornflower Blue #6495ED ΔE 0.039
- Dodger Blue #1E90FF ΔE 0.050
- Water Blue #0E87CC ΔE 0.054
- Faded Blue #658CBB ΔE 0.061
- Cool Blue #4984B8 ΔE 0.063
Use #508BE1 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.