#509FD5
Closest named color: Cornflower Blue (#6495ED). oklch(67.5% 0.112 241), rgb(80, 159, 213).
Aa
Black text reads best on this color (7.26:1).
About this color
#509FD5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.112 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.053 away. Black text reads best on it, at 7.26:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.26:1 |
| White text | 2.89:1 |
Values
| HEX | #509FD5 |
| RGB | rgb(80, 159, 213) |
| HSL | hsl(204, 61%, 57%) |
| OKLCH | oklch(67.5% 0.112 241) |
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 #509FD5 | 2.89:1 | Fails | Lc -60.3 | Content text, not long reading |
| Black text on #509FD5 | 7.26:1 | AAA | Lc 49.1 | Large or bold text, headings |
| #509FD5 text on white | 2.89:1 | Fails | Lc 55.0 | Large or bold text, headings |
| #509FD5 text on black | 7.26:1 | AAA | Lc -46.8 | 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
#C3DDF1
oklch(88.5% 0.039 241.1)
-
Step 300
300
#98C7EA
oklch(80.9% 0.07 240.9)
-
Step 400
400 (this color)
#509FD5
oklch(67.5% 0.112 241)
-
Step 500
500
#1392D7
oklch(63.1% 0.143 241.1)
-
Step 600
600
#007BB7
oklch(55.7% 0.129 240.7)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900
#00466B
oklch(37.7% 0.087 240.8)
-
Step 950
950
#042940
oklch(26.9% 0.059 241.5)
#509FD5 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) | #879FD7 | 0.058 |
| Deuteranopia (no green cones) | #7492D4 | 0.047 |
| Tritanopia (no blue cones) | #00ACB1 | 0.082 |
| Achromatopsia (no color) | #989898 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509FD5
#509FD5
oklch(67.5% 0.112 241)
- #C8864A
#C8864A
oklch(67.5% 0.111 61.3)
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 #509FD5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.053
- Chefchaouen Blue #4895EF ΔE 0.053
- Faded Blue #658CBB ΔE 0.057
- Dark Sky Blue #448EE4 ΔE 0.059
- Greyblue #77A1B5 ΔE 0.061
- Turquoise Blue #06B1C4 ΔE 0.068
- Silver Lake Blue #778DA9 ΔE 0.076
- Bluegrey #85A3B2 ΔE 0.076
Use #509FD5 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.