#55A7DB
Closest named color: Greyblue (#77A1B5). oklch(69.8% 0.111 238.9), rgb(85, 167, 219).
Aa
Black text reads best on this color (7.93:1).
About this color
#55A7DB is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.111 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.059 away. Black text reads best on it, at 7.93:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.93:1 |
| White text | 2.64:1 |
Values
| HEX | #55A7DB |
| RGB | rgb(85, 167, 219) |
| HSL | hsl(203, 65%, 60%) |
| OKLCH | oklch(69.8% 0.111 238.9) |
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 #55A7DB | 2.64:1 | Fails | Lc -56.5 | Large or bold text, headings |
| Black text on #55A7DB | 7.93:1 | AAA | Lc 52.7 | Large or bold text, headings |
| #55A7DB text on white | 2.64:1 | Fails | Lc 51.3 | Large or bold text, headings |
| #55A7DB text on black | 7.93:1 | AAA | Lc -50.6 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DEECF6
oklch(93.6% 0.02 238.7)
-
Step 200
200
#C3DDF0
oklch(88.4% 0.038 239.6)
-
Step 300
300
#97C8E9
oklch(81% 0.069 238.2)
-
Step 400
400 (this color)
#55A7DB
oklch(69.8% 0.111 238.9)
-
Step 500
500
#0393D5
oklch(63.1% 0.142 239)
-
Step 600
600
#007BB4
oklch(55.5% 0.126 239.3)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557D
oklch(42.7% 0.096 238.5)
-
Step 900
900
#004769
oklch(37.8% 0.084 238.3)
-
Step 950
950
#022A40
oklch(27.1% 0.059 238.8)
#55A7DB 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) | #8FA7DD | 0.061 |
| Deuteranopia (no green cones) | #7D99DA | 0.051 |
| Tritanopia (no blue cones) | #00B4B9 | 0.080 |
| Achromatopsia (no color) | #9F9F9F | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55A7DB
#55A7DB
oklch(69.8% 0.111 238.9)
- #D18C54
#D18C54
oklch(69.8% 0.111 58.6)
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 #55A7DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.059
- Turquoise Blue #06B1C4 ΔE 0.061
- Cornflower Blue #6495ED ΔE 0.062
- Chefchaouen Blue #4895EF ΔE 0.066
- Bluegrey #85A3B2 ΔE 0.072
- Deep Sky Blue #00BFFF ΔE 0.073
- Bluey Grey #89A0B0 ΔE 0.076
- Dark Sky Blue #448EE4 ΔE 0.077
Use #55A7DB 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.