#42A2EC
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.9% 0.141 245.4), rgb(66, 162, 236).
Aa
Black text reads best on this color (7.61:1).
About this color
#42A2EC is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.141 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.036 away. Black text reads best on it, at 7.61:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.61:1 |
| White text | 2.75:1 |
Values
| HEX | #42A2EC |
| RGB | rgb(66, 162, 236) |
| HSL | hsl(206, 82%, 59%) |
| OKLCH | oklch(68.9% 0.141 245.4) |
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 #42A2EC | 2.75:1 | Fails | Lc -58.2 | Large or bold text, headings |
| Black text on #42A2EC | 7.61:1 | AAA | Lc 51.1 | Large or bold text, headings |
| #42A2EC text on white | 2.75:1 | Fails | Lc 52.9 | Large or bold text, headings |
| #42A2EC text on black | 7.61:1 | AAA | Lc -48.9 | 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
#EFF6FD
oklch(97% 0.012 248)
-
Step 100
100
#DCECFA
oklch(93.5% 0.026 244.4)
-
Step 200
200
#BFDDF8
oklch(88.4% 0.049 245.6)
-
Step 300
300
#90C7F6
oklch(80.9% 0.088 245)
-
Step 400
400 (this color)
#42A2EC
oklch(68.9% 0.141 245.4)
-
Step 500
500
#0090E3
oklch(63.2% 0.16 245.3)
-
Step 600
600
#0079C0
oklch(55.7% 0.141 245.3)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004571
oklch(37.8% 0.096 245.5)
-
Step 950
950
#002945
oklch(27.1% 0.068 244.5)
#42A2EC 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) | #80A4EF | 0.059 |
| Deuteranopia (no green cones) | #6894EB | 0.045 |
| Tritanopia (no blue cones) | #00B4BC | 0.102 |
| Achromatopsia (no color) | #9C9C9C | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42A2EC
#42A2EC
oklch(68.9% 0.141 245.4)
- #D58626
#D58626
oklch(68.8% 0.141 65.4)
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 #42A2EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.036
- Cornflower Blue #6495ED ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.053
- Dodger Blue #1E90FF ΔE 0.065
- Soft Blue #6488EA ΔE 0.070
- Deep Sky Blue #00BFFF ΔE 0.076
- Faded Blue #658CBB ΔE 0.083
- Periwinkle Blue #8F99FB ΔE 0.084
Use #42A2EC 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.