#188AE3
Closest named color: Dark Sky Blue (#448EE4). oklch(62% 0.163 249.1), rgb(24, 138, 227).
Aa
Black text reads best on this color (5.78:1).
About this color
#188AE3 is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.163 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.028 away. Black text reads best on it, at 5.78:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.78:1 |
| White text | 3.63:1 |
Values
| HEX | #188AE3 |
| RGB | rgb(24, 138, 227) |
| HSL | hsl(206, 81%, 49%) |
| OKLCH | oklch(62% 0.163 249.1) |
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 #188AE3 | 3.63:1 | AA large text | Lc -68.8 | Content text, not long reading |
| Black text on #188AE3 | 5.78:1 | AA | Lc 40.8 | Non-text elements, placeholder text |
| #188AE3 text on white | 3.63:1 | AA large text | Lc 63.3 | Content text, not long reading |
| #188AE3 text on black | 5.78:1 | AA | Lc -38.4 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFECF9
oklch(93.7% 0.022 248.1)
-
Step 200
200
#C3DCF6
oklch(88.4% 0.045 249.4)
-
Step 300
300
#99C5F3
oklch(80.9% 0.08 250)
-
Step 400
400
#5CA6ED
oklch(70.8% 0.128 249.2)
-
Step 500
500 (this color)
#188AE3
oklch(62% 0.163 249.1)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#004376
oklch(37.6% 0.105 249.5)
-
Step 950
950
#052846
oklch(27.1% 0.068 249.1)
#188AE3 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) | #5E90E7 | 0.053 |
| Deuteranopia (no green cones) | #3D7EE1 | 0.033 |
| Tritanopia (no blue cones) | #00A0AB | 0.119 |
| Achromatopsia (no color) | #868686 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #188AE3
#188AE3
oklch(62% 0.163 249.1)
- #BA7500
#BA7500
oklch(62.1% 0.135 69.2)
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 #188AE3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.028
- Water Blue #0E87CC ΔE 0.036
- Dodger Blue #1E90FF ΔE 0.043
- Chefchaouen Blue #4895EF ΔE 0.046
- Soft Blue #6488EA ΔE 0.056
- Clear Blue #247AFD ΔE 0.060
- Windows Blue #3778BF ΔE 0.066
- Cool Blue #4984B8 ΔE 0.067
Use #188AE3 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.