#59B4E2
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.3% 0.109 233), rgb(89, 180, 226).
Aa
Black text reads best on this color (9.05:1).
About this color
#59B4E2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.109 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.050 away. Black text reads best on it, at 9.05:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.05:1 |
| White text | 2.32:1 |
Values
| HEX | #59B4E2 |
| RGB | rgb(89, 180, 226) |
| HSL | hsl(200, 70%, 62%) |
| OKLCH | oklch(73.3% 0.109 233) |
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 #59B4E2 | 2.32:1 | Fails | Lc -50.4 | Large or bold text, headings |
| Black text on #59B4E2 | 9.05:1 | AAA | Lc 58.5 | Large or bold text, headings |
| #59B4E2 text on white | 2.32:1 | Fails | Lc 45.5 | Large or bold text, headings |
| #59B4E2 text on black | 9.05:1 | AAA | Lc -56.6 | 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
#DEECF5
oklch(93.5% 0.019 235.7)
-
Step 200
200
#C1DEEF
oklch(88.5% 0.039 233.6)
-
Step 300
300
#94C9E6
oklch(80.9% 0.069 232.6)
-
Step 400
400 (this color)
#59B4E2
oklch(73.3% 0.109 233)
-
Step 500
500
#0095CB
oklch(63% 0.131 233.2)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#002A3D
oklch(26.9% 0.056 233.8)
#59B4E2 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) | #9EB2E4 | 0.072 |
| Deuteranopia (no green cones) | #8AA4E1 | 0.061 |
| Tritanopia (no blue cones) | #00C0C3 | 0.074 |
| Achromatopsia (no color) | #AAAAAA | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #59B4E2
#59B4E2
oklch(73.3% 0.109 233)
- #DF9565
#DF9565
oklch(73.4% 0.11 53.2)
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 #59B4E2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.050
- Vivid Sky Blue #4CC9F0 ΔE 0.056
- Turquoise Blue #06B1C4 ΔE 0.062
- Carolina Blue #8AB8FE ΔE 0.066
- Bright Sky Blue #02CCFE ΔE 0.068
- Lightblue #7BC8F6 ΔE 0.068
- Greyblue #77A1B5 ΔE 0.073
- Bluegrey #85A3B2 ΔE 0.078
Use #59B4E2 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.