#559DC8
Closest named color: Faded Blue (#658CBB). oklch(66.7% 0.097 236.9), rgb(85, 157, 200).
Aa
Black text reads best on this color (7.04:1).
About this color
#559DC8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.097 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.047 away. Black text reads best on it, at 7.04:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 7.04:1 |
| White text | 2.98:1 |
Values
| HEX | #559DC8 |
| RGB | rgb(85, 157, 200) |
| HSL | hsl(202, 51%, 56%) |
| OKLCH | oklch(66.7% 0.097 236.9) |
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 #559DC8 | 2.98:1 | Fails | Lc -61.6 | Content text, not long reading |
| Black text on #559DC8 | 7.04:1 | AAA | Lc 47.8 | Large or bold text, headings |
| #559DC8 text on white | 2.98:1 | Fails | Lc 56.3 | Large or bold text, headings |
| #559DC8 text on black | 7.04:1 | AAA | Lc -45.5 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CADCE9
oklch(88.5% 0.026 239.1)
-
Step 300
300
#A5C6DC
oklch(81% 0.047 237.4)
-
Step 400
400
#72A8CA
oklch(70.7% 0.076 236.9)
-
Step 500
500 (this color)
#559DC8
oklch(66.7% 0.097 236.9)
-
Step 600
600
#277CA9
oklch(55.7% 0.105 236.7)
-
Step 700
700
#186891
oklch(49.1% 0.098 237)
-
Step 800
800
#185575
oklch(42.7% 0.08 236.4)
-
Step 900
900
#1B465F
oklch(37.6% 0.064 237.4)
-
Step 950
950
#112937
oklch(26.9% 0.04 236.4)
#559DC8 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) | #899CCA | 0.058 |
| Deuteranopia (no green cones) | #7990C7 | 0.049 |
| Tritanopia (no blue cones) | #00A8AB | 0.073 |
| Achromatopsia (no color) | #959595 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559DC8
#559DC8
oklch(66.7% 0.097 236.9)
- #C18557
#C18557
oklch(66.7% 0.096 57.6)
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 #559DC8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.047
- Greyblue #77A1B5 ΔE 0.047
- Silver Lake Blue #778DA9 ΔE 0.060
- Cadet Blue #5F9EA0 ΔE 0.062
- Blue Grey #758DA3 ΔE 0.064
- Turquoise Blue #06B1C4 ΔE 0.064
- Bluegrey #85A3B2 ΔE 0.065
- Bluey Grey #89A0B0 ΔE 0.067
Use #559DC8 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.