#40A4EC
Closest named color: Chefchaouen Blue (#4895EF). oklch(69.3% 0.14 243.9), rgb(64, 164, 236).
Aa
Black text reads best on this color (7.73:1).
About this color
#40A4EC is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.140 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.042 away. Black text reads best on it, at 7.73:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.73:1 |
| White text | 2.71:1 |
Values
| HEX | #40A4EC |
| RGB | rgb(64, 164, 236) |
| HSL | hsl(205, 82%, 59%) |
| OKLCH | oklch(69.3% 0.14 243.9) |
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 #40A4EC | 2.71:1 | Fails | Lc -57.4 | Large or bold text, headings |
| Black text on #40A4EC | 7.73:1 | AAA | Lc 51.8 | Large or bold text, headings |
| #40A4EC text on white | 2.71:1 | Fails | Lc 52.2 | Large or bold text, headings |
| #40A4EC text on black | 7.73:1 | AAA | Lc -49.6 | 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
#EFF7FD
oklch(97.2% 0.012 239.9)
-
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
#8FC7F5
oklch(80.8% 0.088 243.9)
-
Step 400
400 (this color)
#40A4EC
oklch(69.3% 0.14 243.9)
-
Step 500
500
#0091DF
oklch(63.2% 0.154 243.6)
-
Step 600
600
#0079BD
oklch(55.5% 0.138 244.2)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#00456F
oklch(37.6% 0.093 244.3)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#40A4EC 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) | #83A6EF | 0.063 |
| Deuteranopia (no green cones) | #6B96EB | 0.048 |
| Tritanopia (no blue cones) | #00B6BD | 0.100 |
| Achromatopsia (no color) | #9D9D9D | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40A4EC
#40A4EC
oklch(69.3% 0.14 243.9)
- #D7872C
#D7872C
oklch(69.2% 0.14 64.2)
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 #40A4EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.042
- Cornflower Blue #6495ED ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.059
- Dodger Blue #1E90FF ΔE 0.070
- Deep Sky Blue #00BFFF ΔE 0.071
- Soft Blue #6488EA ΔE 0.076
- Turquoise Blue #06B1C4 ΔE 0.082
- Periwinkle Blue #8F99FB ΔE 0.086
Use #40A4EC 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.