#178AF2
Closest named color: Dodger Blue (#1E90FF). oklch(63% 0.182 252.3), rgb(23, 138, 242).
Aa
Black text reads best on this color (5.95:1).
About this color
#178AF2 is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.182 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.024 away. Black text reads best on it, at 5.95:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 5.95:1 |
| White text | 3.52:1 |
Values
| HEX | #178AF2 |
| RGB | rgb(23, 138, 242) |
| HSL | hsl(208, 89%, 52%) |
| OKLCH | oklch(63% 0.182 252.3) |
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 #178AF2 | 3.52:1 | AA large text | Lc -67.7 | Content text, not long reading |
| Black text on #178AF2 | 5.95:1 | AA | Lc 41.9 | Non-text elements, placeholder text |
| #178AF2 text on white | 3.52:1 | AA large text | Lc 62.2 | Content text, not long reading |
| #178AF2 text on black | 5.95:1 | AA | Lc -39.5 | 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
#DEEBFB
oklch(93.5% 0.026 253.6)
-
Step 200
200
#C2DCFA
oklch(88.5% 0.05 252.1)
-
Step 300
300
#97C5F9
oklch(81% 0.089 252)
-
Step 400
400
#59A4F6
oklch(70.7% 0.142 252.3)
-
Step 500
500 (this color)
#178AF2
oklch(63% 0.182 252.3)
-
Step 600
600
#0074D1
oklch(55.7% 0.167 252.1)
-
Step 700
700
#0061B1
oklch(49.1% 0.148 252.3)
-
Step 800
800
#004F92
oklch(42.6% 0.129 252.3)
-
Step 900
900
#00427B
oklch(37.7% 0.113 252.1)
-
Step 950
950
#04274A
oklch(27.1% 0.076 252.4)
#178AF2 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) | #5392F6 | 0.046 |
| Deuteranopia (no green cones) | #2680F0 | 0.025 |
| Tritanopia (no blue cones) | #00A3B2 | 0.134 |
| Achromatopsia (no color) | #888888 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178AF2
#178AF2
oklch(63% 0.182 252.3)
- #BA7900
#BA7900
oklch(62.9% 0.135 72)
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 #178AF2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.024
- Dark Sky Blue #448EE4 ΔE 0.035
- Chefchaouen Blue #4895EF ΔE 0.044
- Clear Blue #247AFD ΔE 0.045
- Soft Blue #6488EA ΔE 0.054
- Water Blue #0E87CC ΔE 0.058
- Cornflower Blue #6495ED ΔE 0.066
- Cornflower #6A79F7 ΔE 0.071
Use #178AF2 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.