#5591C9
Closest named color: Faded Blue (#658CBB). oklch(64% 0.105 248.2), rgb(85, 145, 201).
Aa
Black text reads best on this color (6.27:1).
About this color
#5591C9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.105 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.025 away. Black text reads best on it, at 6.27:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.27:1 |
| White text | 3.34:1 |
Values
| HEX | #5591C9 |
| RGB | rgb(85, 145, 201) |
| HSL | hsl(209, 52%, 56%) |
| OKLCH | oklch(64% 0.105 248.2) |
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 #5591C9 | 3.34:1 | AA large text | Lc -66.2 | Content text, not long reading |
| Black text on #5591C9 | 6.27:1 | AA | Lc 43.4 | Non-text elements, placeholder text |
| #5591C9 text on white | 3.34:1 | AA large text | Lc 60.7 | Content text, not long reading |
| #5591C9 text on black | 6.27:1 | AA | Lc -41.0 | Non-text elements, placeholder text |
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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A7C4E1
oklch(80.8% 0.052 248.5)
-
Step 400
400
#77A5D2
oklch(70.6% 0.083 248.5)
-
Step 500
500 (this color)
#5591C9
oklch(64% 0.105 248.2)
-
Step 600
600
#3578B3
oklch(55.7% 0.114 248.1)
-
Step 700
700
#27649A
oklch(49.1% 0.107 248.6)
-
Step 800
800
#22527D
oklch(42.7% 0.088 248.5)
-
Step 900
900
#214464
oklch(37.6% 0.069 248.2)
-
Step 950
950
#14283B
oklch(27% 0.044 248.6)
#5591C9 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) | #7993CB | 0.041 |
| Deuteranopia (no green cones) | #6A87C8 | 0.033 |
| Tritanopia (no blue cones) | #009EA4 | 0.088 |
| Achromatopsia (no color) | #8C8C8C | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5591C9
#5591C9
oklch(64% 0.105 248.2)
- #B67F3F
#B67F3F
oklch(63.9% 0.105 68)
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 #5591C9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.025
- Cool Blue #4984B8 ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.045
- Dusty Blue #5A86AD ΔE 0.046
- Off Blue #5684AE ΔE 0.048
- Steel Blue #4682B4 ΔE 0.052
- Water Blue #0E87CC ΔE 0.055
- Chefchaouen Blue #4895EF ΔE 0.056
Use #5591C9 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.