#3983DF
Closest named color: Dark Sky Blue (#448EE4). oklch(61% 0.158 255.5), rgb(57, 131, 223).
Aa
Black text reads best on this color (5.48:1).
About this color
#3983DF is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.158 and its hue 256°. 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 5.48:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.48:1 |
| White text | 3.82:1 |
Values
| HEX | #3983DF |
| RGB | rgb(57, 131, 223) |
| HSL | hsl(213, 72%, 55%) |
| OKLCH | oklch(61% 0.158 255.5) |
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 #3983DF | 3.82:1 | AA large text | Lc -70.9 | Content text, not long reading |
| Black text on #3983DF | 5.48:1 | AA | Lc 38.7 | Non-text elements, placeholder text |
| #3983DF text on white | 3.82:1 | AA large text | Lc 65.4 | Content text, not long reading |
| #3983DF text on black | 5.48:1 | AA | Lc -36.3 | 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
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#A0C3F2
oklch(80.8% 0.077 255.9)
-
Step 400
400
#6BA3EC
oklch(70.7% 0.123 255.5)
-
Step 500
500 (this color)
#3983DF
oklch(61% 0.158 255.5)
-
Step 600
600
#1A71D4
oklch(55.5% 0.171 255.6)
-
Step 700
700
#095EB8
oklch(49% 0.16 255.6)
-
Step 800
800
#0E4D95
oklch(42.6% 0.133 255.7)
-
Step 900
900
#164177
oklch(37.7% 0.104 256)
-
Step 950
950
#0E2745
oklch(27.1% 0.064 254.6)
#3983DF 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) | #568BE3 | 0.036 |
| Deuteranopia (no green cones) | #3A7BDD | 0.021 |
| Tritanopia (no blue cones) | #0099A6 | 0.122 |
| Achromatopsia (no color) | #828282 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3983DF
#3983DF
oklch(61% 0.158 255.5)
- #AF7600
#AF7600
oklch(61% 0.128 75.3)
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 #3983DF, 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
- Water Blue #0E87CC ΔE 0.039
- Soft Blue #6488EA ΔE 0.048
- Windows Blue #3778BF ΔE 0.054
- Dodger Blue #1E90FF ΔE 0.054
- Chefchaouen Blue #4895EF ΔE 0.054
- Clear Blue #247AFD ΔE 0.055
- Cool Blue #4984B8 ΔE 0.061
Use #3983DF 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.