#3981D5
Closest named color: Water Blue (#0E87CC). oklch(59.9% 0.147 254.3), rgb(57, 129, 213).
Aa
Black text reads best on this color (5.27:1).
About this color
#3981D5 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.147 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.030 away. Black text reads best on it, at 5.27:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.27:1 |
| White text | 3.98:1 |
Values
| HEX | #3981D5 |
| RGB | rgb(57, 129, 213) |
| HSL | hsl(212, 65%, 53%) |
| OKLCH | oklch(59.9% 0.147 254.3) |
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 #3981D5 | 3.98:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #3981D5 | 5.27:1 | AA | Lc 37.3 | Non-text elements, placeholder text |
| #3981D5 text on white | 3.98:1 | AA large text | Lc 66.8 | Content text, not long reading |
| #3981D5 text on black | 5.27:1 | AA | Lc -34.9 | 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
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A1C4EF
oklch(81% 0.072 253.8)
-
Step 400
400
#6DA4E7
oklch(70.8% 0.115 254.1)
-
Step 500
500 (this color)
#3981D5
oklch(59.9% 0.147 254.3)
-
Step 600
600
#1F73CE
oklch(55.6% 0.16 254.3)
-
Step 700
700
#1060B2
oklch(49.1% 0.149 254.2)
-
Step 800
800
#124F90
oklch(42.8% 0.123 254.1)
-
Step 900
900
#184273
oklch(37.7% 0.096 254.4)
-
Step 950
950
#0F2743
oklch(27% 0.06 253.9)
#3981D5 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) | #5987D8 | 0.036 |
| Deuteranopia (no green cones) | #4179D3 | 0.021 |
| Tritanopia (no blue cones) | #0095A1 | 0.113 |
| Achromatopsia (no color) | #7F7F7F | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3981D5
#3981D5
oklch(59.9% 0.147 254.3)
- #AC7200
#AC7200
oklch(59.8% 0.127 73.9)
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 #3981D5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.030
- Windows Blue #3778BF ΔE 0.039
- Dark Sky Blue #448EE4 ΔE 0.041
- Cool Blue #4984B8 ΔE 0.049
- Steel Blue #4682B4 ΔE 0.052
- Soft Blue #6488EA ΔE 0.058
- Nice Blue #107AB0 ΔE 0.065
- Chefchaouen Blue #4895EF ΔE 0.065
Use #3981D5 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.