#3989DD
Closest named color: Dark Sky Blue (#448EE4). oklch(62.2% 0.149 252.4), rgb(57, 137, 221).
Aa
Black text reads best on this color (5.79:1).
About this color
#3989DD is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.149 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.019 away. Black text reads best on it, at 5.79:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.79:1 |
| White text | 3.62:1 |
Values
| HEX | #3989DD |
| RGB | rgb(57, 137, 221) |
| HSL | hsl(211, 71%, 55%) |
| OKLCH | oklch(62.2% 0.149 252.4) |
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 #3989DD | 3.62:1 | AA large text | Lc -68.9 | Content text, not long reading |
| Black text on #3989DD | 5.79:1 | AA | Lc 40.6 | Non-text elements, placeholder text |
| #3989DD text on white | 3.62:1 | AA large text | Lc 63.5 | Content text, not long reading |
| #3989DD text on black | 5.79:1 | AA | Lc -38.2 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF4
oklch(88.4% 0.041 254)
-
Step 300
300
#9FC4EF
oklch(80.9% 0.073 252.5)
-
Step 400
400
#69A4E7
oklch(70.6% 0.117 252.6)
-
Step 500
500 (this color)
#3989DD
oklch(62.2% 0.149 252.4)
-
Step 600
600
#0F74CE
oklch(55.6% 0.162 252.3)
-
Step 700
700
#0061B1
oklch(49.1% 0.148 252.3)
-
Step 800
800
#074F90
oklch(42.6% 0.125 252.5)
-
Step 900
900
#134373
oklch(37.8% 0.096 252)
-
Step 950
950
#0D2743
oklch(26.9% 0.061 252.5)
#3989DD 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) | #628FE0 | 0.043 |
| Deuteranopia (no green cones) | #487FDB | 0.027 |
| Tritanopia (no blue cones) | #009DA8 | 0.113 |
| Achromatopsia (no color) | #868686 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3989DD
#3989DD
oklch(62.2% 0.149 252.4)
- #B77700
#B77700
oklch(62.1% 0.133 72)
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 #3989DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.019
- Water Blue #0E87CC ΔE 0.035
- Chefchaouen Blue #4895EF ΔE 0.043
- Soft Blue #6488EA ΔE 0.045
- Dodger Blue #1E90FF ΔE 0.051
- Cool Blue #4984B8 ΔE 0.056
- Cornflower Blue #6495ED ΔE 0.058
- Windows Blue #3778BF ΔE 0.060
Use #3989DD 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.