#159BCF
Closest named color: Dark Sky Blue (#448EE4). oklch(64.8% 0.128 232.1), rgb(21, 155, 207).
Aa
Black text reads best on this color (6.62:1).
About this color
#159BCF is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.128 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.057 away. Black text reads best on it, at 6.62:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.62:1 |
| White text | 3.17:1 |
Values
| HEX | #159BCF |
| RGB | rgb(21, 155, 207) |
| HSL | hsl(197, 82%, 45%) |
| OKLCH | oklch(64.8% 0.128 232.1) |
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 #159BCF | 3.17:1 | AA large text | Lc -63.7 | Content text, not long reading |
| Black text on #159BCF | 6.62:1 | AA | Lc 45.7 | Large or bold text, headings |
| #159BCF text on white | 3.17:1 | AA large text | Lc 58.3 | Large or bold text, headings |
| #159BCF text on black | 6.62:1 | AA | Lc -43.4 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DEECF4
oklch(93.5% 0.018 232.5)
-
Step 200
200
#C3DEED
oklch(88.5% 0.035 232.1)
-
Step 300
300
#98C8E3
oklch(80.8% 0.063 233.2)
-
Step 400
400
#59ABD4
oklch(70.6% 0.1 232.3)
-
Step 500
500 (this color)
#159BCF
oklch(64.8% 0.128 232.1)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006A90
oklch(49.2% 0.1 232)
-
Step 800
800
#005676
oklch(42.6% 0.087 232.3)
-
Step 900
900
#004863
oklch(37.7% 0.077 231.8)
-
Step 950
950
#022A3C
oklch(26.9% 0.054 233.4)
#159BCF 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) | #8199D1 | 0.083 |
| Deuteranopia (no green cones) | #6989CE | 0.070 |
| Tritanopia (no blue cones) | #00A9AD | 0.075 |
| Achromatopsia (no color) | #919191 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #159BCF
#159BCF
oklch(64.8% 0.128 232.1)
- #CB763D
#CB763D
oklch(64.9% 0.128 52.3)
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 #159BCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.057
- Water Blue #0E87CC ΔE 0.057
- Blue NCS #118AB2 ΔE 0.059
- Chefchaouen Blue #4895EF ΔE 0.062
- Faded Blue #658CBB ΔE 0.062
- Cool Blue #4984B8 ΔE 0.066
- Turquoise Blue #06B1C4 ΔE 0.070
- Steel Blue #4682B4 ΔE 0.072
Use #159BCF 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.