#42A6F2
Closest named color: Chefchaouen Blue (#4895EF). oklch(70.1% 0.145 245.2), rgb(66, 166, 242).
Aa
Black text reads best on this color (7.96:1).
About this color
#42A6F2 is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.145 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.045 away. Black text reads best on it, at 7.96:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.96:1 |
| White text | 2.63:1 |
Values
| HEX | #42A6F2 |
| RGB | rgb(66, 166, 242) |
| HSL | hsl(206, 87%, 60%) |
| OKLCH | oklch(70.1% 0.145 245.2) |
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 #42A6F2 | 2.63:1 | Fails | Lc -56.2 | Large or bold text, headings |
| Black text on #42A6F2 | 7.96:1 | AAA | Lc 53.0 | Large or bold text, headings |
| #42A6F2 text on white | 2.63:1 | Fails | Lc 51.0 | Large or bold text, headings |
| #42A6F2 text on black | 7.96:1 | AAA | Lc -50.9 | 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
#EFF7FD
oklch(97.2% 0.012 239.9)
-
Step 100
100
#DCECFB
oklch(93.6% 0.027 246.3)
-
Step 200
200
#BEDDF9
oklch(88.4% 0.051 245.7)
-
Step 300
300
#8FC7F8
oklch(80.9% 0.091 245.6)
-
Step 400
400 (this color)
#42A6F2
oklch(70.1% 0.145 245.2)
-
Step 500
500
#0090E2
oklch(63.1% 0.159 245)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004570
oklch(37.7% 0.095 244.9)
-
Step 950
950
#002945
oklch(27.1% 0.068 244.5)
#42A6F2 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) | #83A9F5 | 0.061 |
| Deuteranopia (no green cones) | #6B98F1 | 0.046 |
| Tritanopia (no blue cones) | #00B8C1 | 0.103 |
| Achromatopsia (no color) | #9F9F9F | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42A6F2
#42A6F2
oklch(70.1% 0.145 245.2)
- #DB8926
#DB8926
oklch(70.1% 0.145 65)
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 #42A6F2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.045
- Cornflower Blue #6495ED ΔE 0.048
- Dark Sky Blue #448EE4 ΔE 0.065
- Deep Sky Blue #00BFFF ΔE 0.065
- Dodger Blue #1E90FF ΔE 0.071
- Soft Blue #6488EA ΔE 0.079
- Periwinkle Blue #8F99FB ΔE 0.082
- Turquoise Blue #06B1C4 ΔE 0.087
Use #42A6F2 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.