#55B7ED
Closest named color: Deep Sky Blue (#00BFFF). oklch(74.3% 0.12 235.7), rgb(85, 183, 237).
Aa
Black text reads best on this color (9.38:1).
About this color
#55B7ED is a medium-light, moderately saturated blue. In OKLCH its lightness is 74%, its chroma 0.120 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.037 away. Black text reads best on it, at 9.38:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.38:1 |
| White text | 2.23:1 |
Values
| HEX | #55B7ED |
| RGB | rgb(85, 183, 237) |
| HSL | hsl(201, 81%, 63%) |
| OKLCH | oklch(74.3% 0.12 235.7) |
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 #55B7ED | 2.23:1 | Fails | Lc -48.6 | Large or bold text, headings |
| Black text on #55B7ED | 9.38:1 | AAA | Lc 60.1 | Content text, not long reading |
| #55B7ED text on white | 2.23:1 | Fails | Lc 43.8 | Non-text elements, placeholder text |
| #55B7ED text on black | 9.38:1 | AAA | Lc -58.3 | 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
#EFF7FB
oklch(97.1% 0.01 228.9)
-
Step 100
100
#DDEDF7
oklch(93.7% 0.022 235)
-
Step 200
200
#C0DEF1
oklch(88.5% 0.041 235.7)
-
Step 300
300
#91C9EB
oklch(80.9% 0.075 235.6)
-
Step 400
400 (this color)
#55B7ED
oklch(74.3% 0.12 235.7)
-
Step 500
500
#0094CF
oklch(63% 0.135 235.8)
-
Step 600
600
#007DAF
oklch(55.7% 0.119 235.4)
-
Step 700
700
#006994
oklch(49.2% 0.105 235.5)
-
Step 800
800
#00567A
oklch(42.8% 0.091 235.4)
-
Step 900
900
#004766
oklch(37.6% 0.081 235.8)
-
Step 950
950
#002A3F
oklch(27% 0.059 236.5)
#55B7ED 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) | #9DB6F0 | 0.073 |
| Deuteranopia (no green cones) | #88A7EC | 0.060 |
| Tritanopia (no blue cones) | #00C5C9 | 0.082 |
| Achromatopsia (no color) | #ADADAD | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55B7ED
#55B7ED
oklch(74.3% 0.12 235.7)
- #E5975D
#E5975D
oklch(74.3% 0.12 56.3)
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 #55B7ED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.037
- Vivid Sky Blue #4CC9F0 ΔE 0.049
- Bright Sky Blue #02CCFE ΔE 0.057
- Carolina Blue #8AB8FE ΔE 0.058
- Lightblue #7BC8F6 ΔE 0.061
- Sky #82CAFC ΔE 0.071
- Turquoise Blue #06B1C4 ΔE 0.073
- Light Cornflower Blue #98C1D9 ΔE 0.080
Use #55B7ED 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.