#55A9FF
Closest named color: Cornflower Blue (#6495ED). oklch(72.1% 0.15 251.1), rgb(85, 169, 255).
Aa
Black text reads best on this color (8.50:1).
About this color
#55A9FF is a medium-light, vivid blue. In OKLCH its lightness is 72%, its chroma 0.150 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.053 away. Black text reads best on it, at 8.50:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.50:1 |
| White text | 2.46:1 |
Values
| HEX | #55A9FF |
| RGB | rgb(85, 169, 255) |
| HSL | hsl(210, 100%, 67%) |
| OKLCH | oklch(72.1% 0.15 251.1) |
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 #55A9FF | 2.46:1 | Fails | Lc -53.3 | Large or bold text, headings |
| Black text on #55A9FF | 8.50:1 | AAA | Lc 55.8 | Large or bold text, headings |
| #55A9FF text on white | 2.46:1 | Fails | Lc 48.2 | Large or bold text, headings |
| #55A9FF text on black | 8.50:1 | AAA | Lc -53.8 | 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
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DDECFC
oklch(93.7% 0.027 249.9)
-
Step 200
200
#C0DCFB
oklch(88.4% 0.052 251.1)
-
Step 300
300
#93C5FC
oklch(80.9% 0.094 251.4)
-
Step 400
400 (this color)
#55A9FF
oklch(72.1% 0.15 251.1)
-
Step 500
500
#008BF3
oklch(63.1% 0.184 251.1)
-
Step 600
600
#0075CE
oklch(55.7% 0.162 251.1)
-
Step 700
700
#0062AE
oklch(49.1% 0.143 251.1)
-
Step 800
800
#005090
oklch(42.7% 0.125 251.1)
-
Step 900
900
#004279
oklch(37.6% 0.11 251.3)
-
Step 950
950
#00274B
oklch(27% 0.079 251.1)
#55A9FF 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) | #83AEFF | 0.048 |
| Deuteranopia (no green cones) | #6B9EFD | 0.032 |
| Tritanopia (no blue cones) | #00BDC8 | 0.116 |
| Achromatopsia (no color) | #A5A5A5 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55A9FF
#55A9FF
oklch(72.1% 0.15 251.1)
- #DE9216
#DE9216
oklch(72% 0.15 71.3)
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 #55A9FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.053
- Chefchaouen Blue #4895EF ΔE 0.058
- Deep Sky Blue #00BFFF ΔE 0.062
- Periwinkle Blue #8F99FB ΔE 0.068
- Carolina Blue #8AB8FE ΔE 0.070
- Dodger Blue #1E90FF ΔE 0.080
- Dark Sky Blue #448EE4 ΔE 0.080
- Soft Blue #6488EA ΔE 0.085
Use #55A9FF 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.