#508EB5
Closest named color: Dusty Blue (#5A86AD). oklch(62.1% 0.087 238), rgb(80, 142, 181).
Aa
Black text reads best on this color (5.87:1).
About this color
#508EB5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.087 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.023 away. Black text reads best on it, at 5.87:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.87:1 |
| White text | 3.57:1 |
Values
| HEX | #508EB5 |
| RGB | rgb(80, 142, 181) |
| HSL | hsl(203, 41%, 51%) |
| OKLCH | oklch(62.1% 0.087 238) |
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 #508EB5 | 3.57:1 | AA large text | Lc -68.7 | Content text, not long reading |
| Black text on #508EB5 | 5.87:1 | AA | Lc 40.9 | Non-text elements, placeholder text |
| #508EB5 text on white | 3.57:1 | AA large text | Lc 63.2 | Content text, not long reading |
| #508EB5 text on black | 5.87:1 | AA | Lc -38.5 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A8C5D9
oklch(80.8% 0.042 238.2)
-
Step 400
400
#78A7C7
oklch(70.7% 0.069 238.8)
-
Step 500
500 (this color)
#508EB5
oklch(62.1% 0.087 238)
-
Step 600
600
#357BA4
oklch(55.7% 0.094 237.6)
-
Step 700
700
#27678D
oklch(49.1% 0.089 238.5)
-
Step 800
800
#225472
oklch(42.6% 0.073 238.2)
-
Step 900
900
#21465C
oklch(37.7% 0.057 237)
-
Step 950
950
#142936
oklch(27% 0.036 237.4)
#508EB5 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) | #7C8DB7 | 0.050 |
| Deuteranopia (no green cones) | #6E83B4 | 0.042 |
| Tritanopia (no blue cones) | #00989B | 0.069 |
| Achromatopsia (no color) | #878787 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #508EB5
#508EB5
oklch(62.1% 0.087 238)
- #AE7950
#AE7950
oklch(62.1% 0.087 58)
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 #508EB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.023
- Faded Blue #658CBB ΔE 0.025
- Off Blue #5684AE ΔE 0.028
- Cool Blue #4984B8 ΔE 0.032
- Steel Blue #4682B4 ΔE 0.037
- Blue NCS #118AB2 ΔE 0.042
- Silver Lake Blue #778DA9 ΔE 0.045
- Blue Grey #758DA3 ΔE 0.047
Use #508EB5 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.