#40A4F8
Closest named color: Chefchaouen Blue (#4895EF). oklch(69.9% 0.154 247.7), rgb(64, 164, 248).
Aa
Black text reads best on this color (7.88:1).
About this color
#40A4F8 is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.154 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.039 away. Black text reads best on it, at 7.88:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.88:1 |
| White text | 2.66:1 |
Values
| HEX | #40A4F8 |
| RGB | rgb(64, 164, 248) |
| HSL | hsl(207, 93%, 61%) |
| OKLCH | oklch(69.9% 0.154 247.7) |
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 #40A4F8 | 2.66:1 | Fails | Lc -56.6 | Large or bold text, headings |
| Black text on #40A4F8 | 7.88:1 | AAA | Lc 52.6 | Large or bold text, headings |
| #40A4F8 text on white | 2.66:1 | Fails | Lc 51.4 | Large or bold text, headings |
| #40A4F8 text on black | 7.88:1 | AAA | Lc -50.5 | 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
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DCECFC
oklch(93.6% 0.028 248.1)
-
Step 200
200
#BEDDFB
oklch(88.5% 0.053 247.6)
-
Step 300
300
#8EC7FC
oklch(81% 0.096 247.3)
-
Step 400
400 (this color)
#40A4F8
oklch(69.9% 0.154 247.7)
-
Step 500
500
#008EE9
oklch(63.1% 0.169 247.8)
-
Step 600
600
#0077C5
oklch(55.6% 0.149 247.9)
-
Step 700
700
#0064A6
oklch(49.1% 0.131 247.6)
-
Step 800
800
#00528A
oklch(42.8% 0.115 247.8)
-
Step 900
900
#004474
oklch(37.7% 0.101 247.8)
-
Step 950
950
#002847
oklch(27% 0.072 247.4)
#40A4F8 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) | #7DA8FC | 0.057 |
| Deuteranopia (no green cones) | #6397F6 | 0.040 |
| Tritanopia (no blue cones) | #00B8C2 | 0.112 |
| Achromatopsia (no color) | #9E9E9E | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40A4F8
#40A4F8
oklch(69.9% 0.154 247.7)
- #DC8800
#DC8800
oklch(69.9% 0.154 67.3)
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 #40A4F8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.039
- Cornflower Blue #6495ED ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.061
- Dodger Blue #1E90FF ΔE 0.062
- Deep Sky Blue #00BFFF ΔE 0.071
- Soft Blue #6488EA ΔE 0.074
- Periwinkle Blue #8F99FB ΔE 0.079
- Carolina Blue #8AB8FE ΔE 0.092
Use #40A4F8 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.