#40ABFF
Closest named color: Deep Sky Blue (#00BFFF). oklch(71.8% 0.156 246.3), rgb(64, 171, 255).
Aa
Black text reads best on this color (8.48:1).
About this color
#40ABFF is a medium-light, vivid blue. In OKLCH its lightness is 72%, its chroma 0.156 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.054 away. Black text reads best on it, at 8.48:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.48:1 |
| White text | 2.47:1 |
Values
| HEX | #40ABFF |
| RGB | rgb(64, 171, 255) |
| HSL | hsl(206, 100%, 63%) |
| OKLCH | oklch(71.8% 0.156 246.3) |
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 #40ABFF | 2.47:1 | Fails | Lc -53.3 | Large or bold text, headings |
| Black text on #40ABFF | 8.48:1 | AAA | Lc 55.8 | Large or bold text, headings |
| #40ABFF text on white | 2.47:1 | Fails | Lc 48.2 | Large or bold text, headings |
| #40ABFF text on black | 8.48:1 | AAA | Lc -53.8 | 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
#DBECFC
oklch(93.5% 0.028 246.5)
-
Step 200
200
#BDDDFC
oklch(88.4% 0.055 247.6)
-
Step 300
300
#8CC7FC
oklch(80.9% 0.097 246.4)
-
Step 400
400 (this color)
#40ABFF
oklch(71.8% 0.156 246.3)
-
Step 500
500
#008FE5
oklch(63.1% 0.163 246.3)
-
Step 600
600
#0078C2
oklch(55.6% 0.145 246.5)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005287
oklch(42.6% 0.111 246.5)
-
Step 900
900
#004472
oklch(37.6% 0.099 246.8)
-
Step 950
950
#002846
oklch(26.9% 0.07 246.6)
#40ABFF 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) | #84AEFF | 0.061 |
| Deuteranopia (no green cones) | #699DFD | 0.044 |
| Tritanopia (no blue cones) | #00BFC9 | 0.112 |
| Achromatopsia (no color) | #A5A5A5 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40ABFF
#40ABFF
oklch(71.8% 0.156 246.3)
- #E48D12
#E48D12
oklch(71.8% 0.156 66.3)
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 #40ABFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.054
- Chefchaouen Blue #4895EF ΔE 0.059
- Cornflower Blue #6495ED ΔE 0.060
- Dodger Blue #1E90FF ΔE 0.077
- Carolina Blue #8AB8FE ΔE 0.079
- Dark Sky Blue #448EE4 ΔE 0.081
- Periwinkle Blue #8F99FB ΔE 0.082
- Bright Sky Blue #02CCFE ΔE 0.090
Use #40ABFF 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.