#55AADD
Closest named color: Turquoise Blue (#06B1C4). oklch(70.6% 0.111 237.5), rgb(85, 170, 221).
Aa
Black text reads best on this color (8.18:1).
About this color
#55AADD is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.111 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.059 away. Black text reads best on it, at 8.18:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.18:1 |
| White text | 2.56:1 |
Values
| HEX | #55AADD |
| RGB | rgb(85, 170, 221) |
| HSL | hsl(203, 67%, 60%) |
| OKLCH | oklch(70.6% 0.111 237.5) |
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 #55AADD | 2.56:1 | Fails | Lc -55.1 | Large or bold text, headings |
| Black text on #55AADD | 8.18:1 | AAA | Lc 54.0 | Large or bold text, headings |
| #55AADD text on white | 2.56:1 | Fails | Lc 50.0 | Large or bold text, headings |
| #55AADD text on black | 8.18:1 | AAA | Lc -51.9 | 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
#F0F7FB
oklch(97.2% 0.009 232.4)
-
Step 100
100
#DEECF6
oklch(93.6% 0.02 238.7)
-
Step 200
200
#C2DEF0
oklch(88.6% 0.039 236.1)
-
Step 300
300
#96C8E8
oklch(80.9% 0.069 236.8)
-
Step 400
400 (this color)
#55AADD
oklch(70.6% 0.111 237.5)
-
Step 500
500
#0094D3
oklch(63.2% 0.139 237.5)
-
Step 600
600
#007CB2
oklch(55.6% 0.123 237.7)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950
#012A3F
oklch(27% 0.058 237)
#55AADD 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) | #92A9DF | 0.064 |
| Deuteranopia (no green cones) | #809BDC | 0.055 |
| Tritanopia (no blue cones) | #00B7BB | 0.080 |
| Achromatopsia (no color) | #A2A2A2 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55AADD
#55AADD
oklch(70.6% 0.111 237.5)
- #D48E57
#D48E57
oklch(70.6% 0.111 57.8)
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 #55AADD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.059
- Greyblue #77A1B5 ΔE 0.062
- Deep Sky Blue #00BFFF ΔE 0.066
- Cornflower Blue #6495ED ΔE 0.068
- Chefchaouen Blue #4895EF ΔE 0.071
- Bluegrey #85A3B2 ΔE 0.072
- Bluey Grey #89A0B0 ΔE 0.077
- Carolina Blue #8AB8FE ΔE 0.082
Use #55AADD 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.