#509CCC
Closest named color: Faded Blue (#658CBB). oklch(66.4% 0.104 238.7), rgb(80, 156, 204).
Aa
Black text reads best on this color (6.96:1).
About this color
#509CCC is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.104 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.046 away. Black text reads best on it, at 6.96:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.96:1 |
| White text | 3.01:1 |
Values
| HEX | #509CCC |
| RGB | rgb(80, 156, 204) |
| HSL | hsl(203, 55%, 56%) |
| OKLCH | oklch(66.4% 0.104 238.7) |
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 #509CCC | 3.01:1 | AA large text | Lc -62.0 | Content text, not long reading |
| Black text on #509CCC | 6.96:1 | AA | Lc 47.4 | Large or bold text, headings |
| #509CCC text on white | 3.01:1 | AA large text | Lc 56.6 | Large or bold text, headings |
| #509CCC text on black | 6.96:1 | AA | Lc -45.1 | Large or bold text, headings |
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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C9DCEA
oklch(88.5% 0.028 239.7)
-
Step 300
300
#A3C6DE
oklch(80.9% 0.051 238.2)
-
Step 400
400
#6FA8CE
oklch(70.7% 0.082 238.7)
-
Step 500
500 (this color)
#509CCC
oklch(66.4% 0.104 238.7)
-
Step 600
600
#207BAE
oklch(55.6% 0.113 239.1)
-
Step 700
700
#0F6895
oklch(49.2% 0.105 238.3)
-
Step 800
800
#135579
oklch(42.8% 0.087 238.4)
-
Step 900
900
#194661
oklch(37.7% 0.067 238.6)
-
Step 950
950
#102939
oklch(26.9% 0.043 239.2)
#509CCC 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) | #869CCE | 0.058 |
| Deuteranopia (no green cones) | #758FCB | 0.048 |
| Tritanopia (no blue cones) | #00A8AC | 0.076 |
| Achromatopsia (no color) | #959595 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509CCC
#509CCC
oklch(66.4% 0.104 238.7)
- #C3834F
#C3834F
oklch(66.4% 0.104 58.7)
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 #509CCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.046
- Greyblue #77A1B5 ΔE 0.056
- Dark Sky Blue #448EE4 ΔE 0.061
- Chefchaouen Blue #4895EF ΔE 0.061
- Cornflower Blue #6495ED ΔE 0.061
- Silver Lake Blue #778DA9 ΔE 0.064
- Dusty Blue #5A86AD ΔE 0.067
- Turquoise Blue #06B1C4 ΔE 0.068
Use #509CCC 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.