#509ED2
Closest named color: Faded Blue (#658CBB). oklch(67.1% 0.109 240.3), rgb(80, 158, 210).
Aa
Black text reads best on this color (7.16:1).
About this color
#509ED2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.109 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.053 away. Black text reads best on it, at 7.16:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 7.16:1 |
| White text | 2.93:1 |
Values
| HEX | #509ED2 |
| RGB | rgb(80, 158, 210) |
| HSL | hsl(204, 59%, 57%) |
| OKLCH | oklch(67.1% 0.109 240.3) |
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 #509ED2 | 2.93:1 | Fails | Lc -60.9 | Content text, not long reading |
| Black text on #509ED2 | 7.16:1 | AAA | Lc 48.5 | Large or bold text, headings |
| #509ED2 text on white | 2.93:1 | Fails | Lc 55.5 | Large or bold text, headings |
| #509ED2 text on black | 7.16:1 | AAA | Lc -46.3 | 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 400.
-
Step 50
50
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C4DDF0
oklch(88.5% 0.037 240.7)
-
Step 300
300
#99C7E9
oklch(80.9% 0.068 240.7)
-
Step 400
400 (this color)
#509ED2
oklch(67.1% 0.109 240.3)
-
Step 500
500
#1792D5
oklch(63% 0.14 240.6)
-
Step 600
600
#007BB6
oklch(55.6% 0.128 240.2)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900
#00466B
oklch(37.7% 0.087 240.8)
-
Step 950
950
#042940
oklch(26.9% 0.059 241.5)
#509ED2 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) | #869ED4 | 0.057 |
| Deuteranopia (no green cones) | #7591D1 | 0.048 |
| Tritanopia (no blue cones) | #00ABB0 | 0.080 |
| Achromatopsia (no color) | #979797 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509ED2
#509ED2
oklch(67.1% 0.109 240.3)
- #C6854C
#C6854C
oklch(67.1% 0.109 60.5)
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 #509ED2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.053
- Chefchaouen Blue #4895EF ΔE 0.056
- Cornflower Blue #6495ED ΔE 0.056
- Greyblue #77A1B5 ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.059
- Turquoise Blue #06B1C4 ΔE 0.068
- Silver Lake Blue #778DA9 ΔE 0.072
- Bluegrey #85A3B2 ΔE 0.075
Use #509ED2 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.