#40A0DB
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.5% 0.125 239.6), rgb(64, 160, 219).
Aa
Black text reads best on this color (7.26:1).
About this color
#40A0DB is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.125 and its hue 240°. 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 7.26:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.26:1 |
| White text | 2.88:1 |
Values
| HEX | #40A0DB |
| RGB | rgb(64, 160, 219) |
| HSL | hsl(203, 68%, 55%) |
| OKLCH | oklch(67.5% 0.125 239.6) |
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 #40A0DB | 2.88:1 | Fails | Lc -60.1 | Content text, not long reading |
| Black text on #40A0DB | 7.26:1 | AAA | Lc 49.2 | Large or bold text, headings |
| #40A0DB text on white | 2.88:1 | Fails | Lc 54.8 | Large or bold text, headings |
| #40A0DB text on black | 7.26:1 | AAA | Lc -47.0 | 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
#C0DEF3
oklch(88.5% 0.043 238.5)
-
Step 300
300
#92C8EE
oklch(80.9% 0.078 239.6)
-
Step 400
400 (this color)
#40A0DB
oklch(67.5% 0.125 239.6)
-
Step 500
500
#0093D6
oklch(63.1% 0.143 239.3)
-
Step 600
600
#007BB5
oklch(55.6% 0.127 239.8)
-
Step 700
700
#006799
oklch(49% 0.112 240)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900
#00466A
oklch(37.6% 0.086 240.1)
-
Step 950
950
#002A41
oklch(27.1% 0.061 239)
#40A0DB 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) | #85A0DE | 0.067 |
| Deuteranopia (no green cones) | #6F91DA | 0.054 |
| Tritanopia (no blue cones) | #00AFB4 | 0.086 |
| Achromatopsia (no color) | #989898 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40A0DB
#40A0DB
oklch(67.5% 0.125 239.6)
- #CE823F
#CE823F
oklch(67.4% 0.125 59.4)
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 #40A0DB, 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 0.053
- Dark Sky Blue #448EE4 ΔE 0.054
- Faded Blue #658CBB ΔE 0.066
- Turquoise Blue #06B1C4 ΔE 0.069
- Greyblue #77A1B5 ΔE 0.073
- Soft Blue #6488EA ΔE 0.076
- Water Blue #0E87CC ΔE 0.078
Use #40A0DB 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.