#59AAFF
Closest named color: Cornflower Blue (#6495ED). oklch(72.4% 0.148 251.5), rgb(89, 170, 255).
Aa
Black text reads best on this color (8.61:1).
About this color
#59AAFF is a medium-light, vivid blue. In OKLCH its lightness is 72%, its chroma 0.148 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.056 away. Black text reads best on it, at 8.61:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.61:1 |
| White text | 2.43:1 |
Values
| HEX | #59AAFF |
| RGB | rgb(89, 170, 255) |
| HSL | hsl(211, 100%, 67%) |
| OKLCH | oklch(72.4% 0.148 251.5) |
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 #59AAFF | 2.43:1 | Fails | Lc -52.7 | Large or bold text, headings |
| Black text on #59AAFF | 8.61:1 | AAA | Lc 56.3 | Large or bold text, headings |
| #59AAFF text on white | 2.43:1 | Fails | Lc 47.7 | Large or bold text, headings |
| #59AAFF text on black | 8.61:1 | AAA | Lc -54.3 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DDECFC
oklch(93.7% 0.027 249.9)
-
Step 200
200
#C1DCFB
oklch(88.5% 0.052 252)
-
Step 300
300
#94C5FB
oklch(80.9% 0.093 251.4)
-
Step 400
400 (this color)
#59AAFF
oklch(72.4% 0.148 251.5)
-
Step 500
500
#008BF5
oklch(63.2% 0.186 251.5)
-
Step 600
600
#0074CF
oklch(55.5% 0.165 251.7)
-
Step 700
700
#0062AF
oklch(49.2% 0.144 251.3)
-
Step 800
800
#005091
oklch(42.8% 0.126 251.5)
-
Step 900
900
#00427A
oklch(37.7% 0.112 251.7)
-
Step 950
950
#01274B
oklch(27% 0.078 251.6)
#59AAFF 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) | #85AFFF | 0.047 |
| Deuteranopia (no green cones) | #6E9FFD | 0.032 |
| Tritanopia (no blue cones) | #00BEC9 | 0.116 |
| Achromatopsia (no color) | #A6A6A6 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #59AAFF
#59AAFF
oklch(72.4% 0.148 251.5)
- #DE941F
#DE941F
oklch(72.4% 0.147 71.7)
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 #59AAFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.056
- Deep Sky Blue #00BFFF ΔE 0.061
- Chefchaouen Blue #4895EF ΔE 0.061
- Carolina Blue #8AB8FE ΔE 0.066
- Periwinkle Blue #8F99FB ΔE 0.066
- Dodger Blue #1E90FF ΔE 0.084
- Dark Sky Blue #448EE4 ΔE 0.084
- Soft Blue #6488EA ΔE 0.088
Use #59AAFF 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.