#508FCB
Closest named color: Faded Blue (#658CBB). oklch(63.4% 0.112 248.9), rgb(80, 143, 203).
Aa
Black text reads best on this color (6.13:1).
About this color
#508FCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.112 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.030 away. Black text reads best on it, at 6.13:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.13:1 |
| White text | 3.42:1 |
Values
| HEX | #508FCB |
| RGB | rgb(80, 143, 203) |
| HSL | hsl(209, 54%, 55%) |
| OKLCH | oklch(63.4% 0.112 248.9) |
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 #508FCB | 3.42:1 | AA large text | Lc -67.0 | Content text, not long reading |
| Black text on #508FCB | 6.13:1 | AA | Lc 42.5 | Non-text elements, placeholder text |
| #508FCB text on white | 3.42:1 | AA large text | Lc 61.6 | Content text, not long reading |
| #508FCB text on black | 6.13:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADBED
oklch(88.4% 0.031 249.7)
-
Step 300
300
#A6C4E3
oklch(80.9% 0.055 249.4)
-
Step 400
400
#75A5D5
oklch(70.6% 0.088 249.2)
-
Step 500
500 (this color)
#508FCB
oklch(63.4% 0.112 248.9)
-
Step 600
600
#3077B7
oklch(55.6% 0.122 249)
-
Step 700
700
#22649D
oklch(49.1% 0.112 248.6)
-
Step 800
800
#1F5280
oklch(42.8% 0.094 249)
-
Step 900
900
#1F4466
oklch(37.7% 0.072 248.5)
-
Step 950
950
#13283C
oklch(27% 0.046 248.8)
#508FCB 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) | #7591CE | 0.042 |
| Deuteranopia (no green cones) | #6585CA | 0.032 |
| Tritanopia (no blue cones) | #009DA4 | 0.090 |
| Achromatopsia (no color) | #8B8B8B | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #508FCB
#508FCB
oklch(63.4% 0.112 248.9)
- #B67D36
#B67D36
oklch(63.5% 0.112 69.1)
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 #508FCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.039
- Cool Blue #4984B8 ΔE 0.040
- Dusty Blue #5A86AD ΔE 0.046
- Off Blue #5684AE ΔE 0.047
- Water Blue #0E87CC ΔE 0.048
- Steel Blue #4682B4 ΔE 0.048
- Chefchaouen Blue #4895EF ΔE 0.053
Use #508FCB 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.