#40A9F8
Closest named color: Chefchaouen Blue (#4895EF). oklch(71% 0.15 245.2), rgb(64, 169, 248).
Aa
Black text reads best on this color (8.24:1).
About this color
#40A9F8 is a medium-light, vivid blue. In OKLCH its lightness is 71%, its chroma 0.150 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.052 away. Black text reads best on it, at 8.24:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 8.24:1 |
| White text | 2.54:1 |
Values
| HEX | #40A9F8 |
| RGB | rgb(64, 169, 248) |
| HSL | hsl(206, 93%, 61%) |
| OKLCH | oklch(71% 0.15 245.2) |
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 #40A9F8 | 2.54:1 | Fails | Lc -54.6 | Large or bold text, headings |
| Black text on #40A9F8 | 8.24:1 | AAA | Lc 54.5 | Large or bold text, headings |
| #40A9F8 text on white | 2.54:1 | Fails | Lc 49.5 | Large or bold text, headings |
| #40A9F8 text on black | 8.24:1 | AAA | Lc -52.5 | 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
#EFF7FE
oklch(97.2% 0.013 244.3)
-
Step 100
100
#DCECFB
oklch(93.6% 0.027 246.3)
-
Step 200
200
#BDDDFA
oklch(88.4% 0.053 245.8)
-
Step 300
300
#8DC7F9
oklch(80.8% 0.093 245.3)
-
Step 400
400 (this color)
#40A9F8
oklch(71% 0.15 245.2)
-
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)
#40A9F8 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) | #85ACFB | 0.064 |
| Deuteranopia (no green cones) | #6B9BF7 | 0.046 |
| Tritanopia (no blue cones) | #00BCC5 | 0.106 |
| Achromatopsia (no color) | #A2A2A2 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40A9F8
#40A9F8
oklch(71% 0.15 245.2)
- #E08B21
#E08B21
oklch(71% 0.15 65.1)
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 #40A9F8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.052
- Cornflower Blue #6495ED ΔE 0.055
- Deep Sky Blue #00BFFF ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.073
- Dodger Blue #1E90FF ΔE 0.075
- Periwinkle Blue #8F99FB ΔE 0.082
- Carolina Blue #8AB8FE ΔE 0.082
- Soft Blue #6488EA ΔE 0.086
Use #40A9F8 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.