#40A3E2
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.5% 0.13 240.6), rgb(64, 163, 226).
Aa
Black text reads best on this color (7.55:1).
About this color
#40A3E2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.130 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.047 away. Black text reads best on it, at 7.55:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.55:1 |
| White text | 2.77:1 |
Values
| HEX | #40A3E2 |
| RGB | rgb(64, 163, 226) |
| HSL | hsl(203, 74%, 57%) |
| OKLCH | oklch(68.5% 0.13 240.6) |
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 #40A3E2 | 2.77:1 | Fails | Lc -58.5 | Large or bold text, headings |
| Black text on #40A3E2 | 7.55:1 | AAA | Lc 50.8 | Large or bold text, headings |
| #40A3E2 text on white | 2.77:1 | Fails | Lc 53.3 | Large or bold text, headings |
| #40A3E2 text on black | 7.55:1 | AAA | Lc -48.6 | 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
#EFF7FC
oklch(97.2% 0.011 234.8)
-
Step 100
100
#DDECF8
oklch(93.5% 0.023 241.9)
-
Step 200
200
#BFDEF5
oklch(88.5% 0.046 240.2)
-
Step 300
300
#91C8F0
oklch(80.9% 0.081 240.6)
-
Step 400
400 (this color)
#40A3E2
oklch(68.5% 0.13 240.6)
-
Step 500
500
#0092D8
oklch(63% 0.146 240.6)
-
Step 600
600
#007BB7
oklch(55.7% 0.129 240.7)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900
#00466B
oklch(37.7% 0.087 240.8)
-
Step 950
950
#002942
oklch(26.9% 0.063 241.6)
#40A3E2 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) | #86A4E5 | 0.067 |
| Deuteranopia (no green cones) | #7094E1 | 0.054 |
| Tritanopia (no blue cones) | #00B3B9 | 0.089 |
| Achromatopsia (no color) | #9B9B9B | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40A3E2
#40A3E2
oklch(68.5% 0.13 240.6)
- #D3853C
#D3853C
oklch(68.5% 0.13 60.7)
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 #40A3E2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.047
- Cornflower Blue #6495ED ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.058
- Turquoise Blue #06B1C4 ΔE 0.071
- Faded Blue #658CBB ΔE 0.076
- Dodger Blue #1E90FF ΔE 0.077
- Deep Sky Blue #00BFFF ΔE 0.077
- Greyblue #77A1B5 ΔE 0.078
Use #40A3E2 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.