#509FD7
Closest named color: Cornflower Blue (#6495ED). oklch(67.6% 0.114 242), rgb(80, 159, 215).
Aa
Black text reads best on this color (7.28:1).
About this color
#509FD7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.114 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.051 away. Black text reads best on it, at 7.28:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.28:1 |
| White text | 2.88:1 |
Values
| HEX | #509FD7 |
| RGB | rgb(80, 159, 215) |
| HSL | hsl(205, 63%, 58%) |
| OKLCH | oklch(67.6% 0.114 242) |
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 #509FD7 | 2.88:1 | Fails | Lc -60.2 | Content text, not long reading |
| Black text on #509FD7 | 7.28:1 | AAA | Lc 49.2 | Large or bold text, headings |
| #509FD7 text on white | 2.88:1 | Fails | Lc 54.9 | Large or bold text, headings |
| #509FD7 text on black | 7.28:1 | AAA | Lc -46.9 | 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
#DEECF7
oklch(93.6% 0.021 241.4)
-
Step 200
200
#C3DDF2
oklch(88.5% 0.04 242.4)
-
Step 300
300
#98C7EB
oklch(80.9% 0.071 241.7)
-
Step 400
400 (this color)
#509FD7
oklch(67.6% 0.114 242)
-
Step 500
500
#1292D9
oklch(63.2% 0.145 241.8)
-
Step 600
600
#007AB9
oklch(55.5% 0.132 242.1)
-
Step 700
700
#00679C
oklch(49.2% 0.116 241.5)
-
Step 800
800
#005481
oklch(42.7% 0.101 241.9)
-
Step 900
900
#00466C
oklch(37.7% 0.089 241.5)
-
Step 950
950
#032941
oklch(26.9% 0.061 242.1)
#509FD7 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) | #86A0DA | 0.057 |
| Deuteranopia (no green cones) | #7392D6 | 0.046 |
| Tritanopia (no blue cones) | #00ADB2 | 0.085 |
| Achromatopsia (no color) | #989898 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509FD7
#509FD7
oklch(67.6% 0.114 242)
- #C98647
#C98647
oklch(67.6% 0.114 62)
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 #509FD7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.051
- Chefchaouen Blue #4895EF ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.057
- Faded Blue #658CBB ΔE 0.058
- Greyblue #77A1B5 ΔE 0.063
- Turquoise Blue #06B1C4 ΔE 0.070
- Soft Blue #6488EA ΔE 0.075
- Silver Lake Blue #778DA9 ΔE 0.078
Use #509FD7 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.