#40A4FC
Closest named color: Chefchaouen Blue (#4895EF). oklch(70.1% 0.159 248.8), rgb(64, 164, 252).
Aa
Black text reads best on this color (7.93:1).
About this color
#40A4FC is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.159 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.040 away. Black text reads best on it, at 7.93:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.93:1 |
| White text | 2.64:1 |
Values
| HEX | #40A4FC |
| RGB | rgb(64, 164, 252) |
| HSL | hsl(208, 97%, 62%) |
| OKLCH | oklch(70.1% 0.159 248.8) |
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 #40A4FC | 2.64:1 | Fails | Lc -56.3 | Large or bold text, headings |
| Black text on #40A4FC | 7.93:1 | AAA | Lc 52.9 | Large or bold text, headings |
| #40A4FC text on white | 2.64:1 | Fails | Lc 51.1 | Large or bold text, headings |
| #40A4FC text on black | 7.93:1 | AAA | Lc -50.8 | 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
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DCECFD
oklch(93.6% 0.029 249.8)
-
Step 200
200
#BEDDFD
oklch(88.5% 0.055 249.3)
-
Step 300
300
#8EC6FE
oklch(80.9% 0.099 249.1)
-
Step 400
400 (this color)
#40A4FC
oklch(70.1% 0.159 248.8)
-
Step 500
500
#008DEC
oklch(63.1% 0.173 248.9)
-
Step 600
600
#0076C7
oklch(55.5% 0.153 248.9)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#004475
oklch(37.8% 0.103 248.3)
-
Step 950
950
#002849
oklch(27.1% 0.074 248.8)
#40A4FC 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) | #7BA9FF | 0.055 |
| Deuteranopia (no green cones) | #6097FA | 0.038 |
| Tritanopia (no blue cones) | #00B9C4 | 0.116 |
| Achromatopsia (no color) | #9F9F9F | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40A4FC
#40A4FC
oklch(70.1% 0.159 248.8)
- #DB8A00
#DB8A00
oklch(70.1% 0.153 68.9)
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 #40A4FC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.040
- Cornflower Blue #6495ED ΔE 0.045
- Dodger Blue #1E90FF ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.063
- Deep Sky Blue #00BFFF ΔE 0.072
- Soft Blue #6488EA ΔE 0.074
- Periwinkle Blue #8F99FB ΔE 0.078
- Carolina Blue #8AB8FE ΔE 0.092
Use #40A4FC 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.