#508FBB
Closest named color: Faded Blue (#658CBB). oklch(62.6% 0.093 240.9), rgb(80, 143, 187).
Aa
Black text reads best on this color (5.98:1).
About this color
#508FBB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.093 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.022 away. Black text reads best on it, at 5.98:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.98:1 |
| White text | 3.50:1 |
Values
| HEX | #508FBB |
| RGB | rgb(80, 143, 187) |
| HSL | hsl(205, 44%, 52%) |
| OKLCH | oklch(62.6% 0.093 240.9) |
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 #508FBB | 3.50:1 | AA large text | Lc -68.0 | Content text, not long reading |
| Black text on #508FBB | 5.98:1 | AA | Lc 41.6 | Non-text elements, placeholder text |
| #508FBB text on white | 3.50:1 | AA large text | Lc 62.5 | Content text, not long reading |
| #508FBB text on black | 5.98:1 | AA | Lc -39.2 | 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
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CBDCE9
oklch(88.6% 0.026 240.7)
-
Step 300
300
#A7C5DC
oklch(80.9% 0.046 241.2)
-
Step 400
400
#77A7CA
oklch(70.7% 0.073 240.7)
-
Step 500
500 (this color)
#508FBB
oklch(62.6% 0.093 240.9)
-
Step 600
600
#337AA9
oklch(55.6% 0.102 241.1)
-
Step 700
700
#256791
oklch(49.2% 0.094 240.7)
-
Step 800
800
#215476
oklch(42.8% 0.078 241.2)
-
Step 900
900
#20455F
oklch(37.6% 0.062 241.6)
-
Step 950
950
#142937
oklch(27% 0.038 239.4)
#508FBB 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) | #7B8FBD | 0.049 |
| Deuteranopia (no green cones) | #6D84BA | 0.041 |
| Tritanopia (no blue cones) | #009A9E | 0.074 |
| Achromatopsia (no color) | #898989 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #508FBB
#508FBB
oklch(62.6% 0.093 240.9)
- #B17A4B
#B17A4B
oklch(62.6% 0.093 60.4)
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 #508FBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.022
- Dusty Blue #5A86AD ΔE 0.029
- Off Blue #5684AE ΔE 0.032
- Cool Blue #4984B8 ΔE 0.033
- Steel Blue #4682B4 ΔE 0.039
- Blue NCS #118AB2 ΔE 0.045
- Silver Lake Blue #778DA9 ΔE 0.048
- Blue Grey #758DA3 ΔE 0.051
Use #508FBB 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.