#59AFF9
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.2% 0.136 247), rgb(89, 175, 249).
Aa
Black text reads best on this color (8.92:1).
About this color
#59AFF9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.136 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.048 away. Black text reads best on it, at 8.92:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.92:1 |
| White text | 2.35:1 |
Values
| HEX | #59AFF9 |
| RGB | rgb(89, 175, 249) |
| HSL | hsl(208, 93%, 66%) |
| OKLCH | oklch(73.2% 0.136 247) |
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 #59AFF9 | 2.35:1 | Fails | Lc -51.1 | Large or bold text, headings |
| Black text on #59AFF9 | 8.92:1 | AAA | Lc 57.9 | Large or bold text, headings |
| #59AFF9 text on white | 2.35:1 | Fails | Lc 46.1 | Large or bold text, headings |
| #59AFF9 text on black | 8.92:1 | AAA | Lc -55.9 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DDECFA
oklch(93.6% 0.025 246.2)
-
Step 200
200
#C1DDF7
oklch(88.5% 0.047 246.4)
-
Step 300
300
#94C6F5
oklch(80.8% 0.085 247.4)
-
Step 400
400 (this color)
#59AFF9
oklch(73.2% 0.136 247)
-
Step 500
500
#008FE7
oklch(63.2% 0.166 246.8)
-
Step 600
600
#0078C3
oklch(55.7% 0.146 246.8)
-
Step 700
700
#0064A5
oklch(49% 0.13 247.2)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#004473
oklch(37.7% 0.1 247.4)
-
Step 950
950
#002847
oklch(27% 0.072 247.4)
#59AFF9 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) | #8EB2FC | 0.055 |
| Deuteranopia (no green cones) | #79A2F8 | 0.042 |
| Tritanopia (no blue cones) | #00C1C9 | 0.105 |
| Achromatopsia (no color) | #A9A9A9 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #59AFF9
#59AFF9
oklch(73.2% 0.136 247)
- #E1963C
#E1963C
oklch(73.3% 0.137 67.2)
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 #59AFF9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.048
- Carolina Blue #8AB8FE ΔE 0.057
- Cornflower Blue #6495ED ΔE 0.067
- Chefchaouen Blue #4895EF ΔE 0.073
- Vivid Sky Blue #4CC9F0 ΔE 0.076
- Periwinkle Blue #8F99FB ΔE 0.076
- Bright Sky Blue #02CCFE ΔE 0.079
- Lightblue #7BC8F6 ΔE 0.080
Use #59AFF9 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.