#509ECB
Closest named color: Faded Blue (#658CBB). oklch(66.8% 0.102 236.4), rgb(80, 158, 203).
Aa
Black text reads best on this color (7.09:1).
About this color
#509ECB is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.102 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.050 away. Black text reads best on it, at 7.09:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 7.09:1 |
| White text | 2.96:1 |
Values
| HEX | #509ECB |
| RGB | rgb(80, 158, 203) |
| HSL | hsl(202, 54%, 55%) |
| OKLCH | oklch(66.8% 0.102 236.4) |
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 #509ECB | 2.96:1 | Fails | Lc -61.3 | Content text, not long reading |
| Black text on #509ECB | 7.09:1 | AAA | Lc 48.1 | Large or bold text, headings |
| #509ECB text on white | 2.96:1 | Fails | Lc 55.9 | Large or bold text, headings |
| #509ECB text on black | 7.09:1 | AAA | Lc -45.8 | 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 500.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DCE9
oklch(88.4% 0.027 237.6)
-
Step 300
300
#A3C6DD
oklch(80.9% 0.05 237)
-
Step 400
400
#6FA9CC
oklch(70.8% 0.079 236)
-
Step 500
500 (this color)
#509ECB
oklch(66.8% 0.102 236.4)
-
Step 600
600
#1D7CAB
oklch(55.6% 0.11 236.3)
-
Step 700
700
#0A6893
oklch(49% 0.103 236.6)
-
Step 800
800
#105577
oklch(42.6% 0.085 236.3)
-
Step 900
900
#184760
oklch(37.8% 0.066 235.7)
-
Step 950
950
#102938
oklch(26.9% 0.042 237.4)
#509ECB 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) | #899DCD | 0.061 |
| Deuteranopia (no green cones) | #7890CA | 0.053 |
| Tritanopia (no blue cones) | #00AAAD | 0.074 |
| Achromatopsia (no color) | #969696 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509ECB
#509ECB
oklch(66.8% 0.102 236.4)
- #C48454
#C48454
oklch(66.8% 0.102 56.8)
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 #509ECB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.050
- Greyblue #77A1B5 ΔE 0.052
- Turquoise Blue #06B1C4 ΔE 0.062
- Chefchaouen Blue #4895EF ΔE 0.065
- Cadet Blue #5F9EA0 ΔE 0.065
- Silver Lake Blue #778DA9 ΔE 0.065
- Cornflower Blue #6495ED ΔE 0.066
- Dark Sky Blue #448EE4 ΔE 0.066
Use #509ECB 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.