#55A5CF
Closest named color: Greyblue (#77A1B5). oklch(68.8% 0.1 233.7), rgb(85, 165, 207).
Aa
Black text reads best on this color (7.66:1).
About this color
#55A5CF is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.100 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.046 away. Black text reads best on it, at 7.66:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.66:1 |
| White text | 2.73:1 |
Values
| HEX | #55A5CF |
| RGB | rgb(85, 165, 207) |
| HSL | hsl(201, 56%, 57%) |
| OKLCH | oklch(68.8% 0.1 233.7) |
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 #55A5CF | 2.73:1 | Fails | Lc -58.0 | Large or bold text, headings |
| Black text on #55A5CF | 7.66:1 | AAA | Lc 51.3 | Large or bold text, headings |
| #55A5CF text on white | 2.73:1 | Fails | Lc 52.8 | Large or bold text, headings |
| #55A5CF text on black | 7.66:1 | AAA | Lc -49.1 | 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
#C4DEED
oklch(88.6% 0.035 233.1)
-
Step 300
300
#99C8E3
oklch(80.9% 0.062 233.7)
-
Step 400
400 (this color)
#55A5CF
oklch(68.8% 0.1 233.7)
-
Step 500
500
#1395CA
oklch(63.1% 0.127 233.5)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#004865
oklch(37.8% 0.079 233.7)
-
Step 950
950
#042A3C
oklch(26.9% 0.053 234.4)
#55A5CF 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) | #91A3D1 | 0.065 |
| Deuteranopia (no green cones) | #8097CE | 0.055 |
| Tritanopia (no blue cones) | #00B0B3 | 0.070 |
| Achromatopsia (no color) | #9C9C9C | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55A5CF
#55A5CF
oklch(68.8% 0.1 233.7)
- #CB895E
#CB895E
oklch(68.7% 0.1 53.4)
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 #55A5CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.046
- Turquoise Blue #06B1C4 ΔE 0.052
- Bluegrey #85A3B2 ΔE 0.061
- Bluey Grey #89A0B0 ΔE 0.065
- Cadet Blue #5F9EA0 ΔE 0.067
- Faded Blue #658CBB ΔE 0.068
- Cornflower Blue #6495ED ΔE 0.072
- Cool Gray #8D99AE ΔE 0.072
Use #55A5CF 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.