#4083E8
Closest named color: Dark Sky Blue (#448EE4). oklch(61.8% 0.167 258.6), rgb(64, 131, 232).
Aa
Black text reads best on this color (5.62:1).
About this color
#4083E8 is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.167 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.032 away. Black text reads best on it, at 5.62:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.62:1 |
| White text | 3.73:1 |
Values
| HEX | #4083E8 |
| RGB | rgb(64, 131, 232) |
| HSL | hsl(216, 79%, 58%) |
| OKLCH | oklch(61.8% 0.167 258.6) |
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 #4083E8 | 3.73:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #4083E8 | 5.62:1 | AA | Lc 39.6 | Non-text elements, placeholder text |
| #4083E8 text on white | 3.73:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #4083E8 text on black | 5.62:1 | AA | Lc -37.2 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF8
oklch(88.6% 0.046 257.6)
-
Step 300
300
#A1C2F6
oklch(80.8% 0.082 259.4)
-
Step 400
400
#6DA1F1
oklch(70.7% 0.13 258.7)
-
Step 500
500 (this color)
#4083E8
oklch(61.8% 0.167 258.6)
-
Step 600
600
#236EDB
oklch(55.5% 0.182 258.6)
-
Step 700
700
#155BBE
oklch(49% 0.17 258.7)
-
Step 800
800
#154B9A
oklch(42.7% 0.141 258.7)
-
Step 900
900
#19407A
oklch(37.8% 0.108 258.5)
-
Step 950
950
#0F2648
oklch(27.1% 0.07 258.2)
#4083E8 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) | #518DEC | 0.033 |
| Deuteranopia (no green cones) | #317DE6 | 0.021 |
| Tritanopia (no blue cones) | #009BAA | 0.132 |
| Achromatopsia (no color) | #848484 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4083E8
#4083E8
oklch(61.8% 0.167 258.6)
- #AF7A00
#AF7A00
oklch(61.8% 0.129 78.2)
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 #4083E8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.032
- Soft Blue #6488EA ΔE 0.040
- Dodger Blue #1E90FF ΔE 0.044
- Clear Blue #247AFD ΔE 0.046
- Chefchaouen Blue #4895EF ΔE 0.049
- Water Blue #0E87CC ΔE 0.053
- Cornflower #6A79F7 ΔE 0.054
- Cornflower Blue #6495ED ΔE 0.063
Use #4083E8 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.