#55A1CB
Closest named color: Greyblue (#77A1B5). oklch(67.7% 0.098 234.9), rgb(85, 161, 203).
Aa
Black text reads best on this color (7.34:1).
About this color
#55A1CB is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.098 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.045 away. Black text reads best on it, at 7.34:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.34:1 |
| White text | 2.85:1 |
Values
| HEX | #55A1CB |
| RGB | rgb(85, 161, 203) |
| HSL | hsl(201, 53%, 56%) |
| OKLCH | oklch(67.7% 0.098 234.9) |
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 #55A1CB | 2.85:1 | Fails | Lc -59.8 | Large or bold text, headings |
| Black text on #55A1CB | 7.34:1 | AAA | Lc 49.5 | Large or bold text, headings |
| #55A1CB text on white | 2.85:1 | Fails | Lc 54.5 | Large or bold text, headings |
| #55A1CB text on black | 7.34:1 | AAA | Lc -47.3 | 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
#F0F6FA
oklch(97% 0.008 236.6)
-
Step 100
100
#DFECF4
oklch(93.6% 0.018 234.5)
-
Step 200
200
#C4DDED
oklch(88.4% 0.035 235.9)
-
Step 300
300
#9BC8E3
oklch(81% 0.061 234.9)
-
Step 400
400 (this color)
#55A1CB
oklch(67.7% 0.098 234.9)
-
Step 500
500
#2094CA
oklch(63.1% 0.125 235.2)
-
Step 600
600
#007DAE
oklch(55.7% 0.118 234.9)
-
Step 700
700
#006993
oklch(49.2% 0.104 234.9)
-
Step 800
800
#005679
oklch(42.8% 0.09 234.7)
-
Step 900
900
#004766
oklch(37.6% 0.081 235.8)
-
Step 950
950
#062A3C
oklch(27% 0.052 235.4)
#55A1CB 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) | #8DA0CD | 0.061 |
| Deuteranopia (no green cones) | #7D93CA | 0.053 |
| Tritanopia (no blue cones) | #00ACAF | 0.071 |
| Achromatopsia (no color) | #999999 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55A1CB
#55A1CB
oklch(67.7% 0.098 234.9)
- #C6875B
#C6875B
oklch(67.7% 0.098 55.2)
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 #55A1CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.045
- Turquoise Blue #06B1C4 ΔE 0.057
- Faded Blue #658CBB ΔE 0.057
- Bluegrey #85A3B2 ΔE 0.062
- Cadet Blue #5F9EA0 ΔE 0.063
- Bluey Grey #89A0B0 ΔE 0.065
- Silver Lake Blue #778DA9 ΔE 0.068
- Cool Gray #8D99AE ΔE 0.069
Use #55A1CB 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.