#3983C8
Closest named color: Water Blue (#0E87CC). oklch(59.6% 0.129 249.5), rgb(57, 131, 200).
Aa
Black text reads best on this color (5.25:1).
About this color
#3983C8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.129 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.020 away. Black text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.25:1 |
| White text | 3.99:1 |
Values
| HEX | #3983C8 |
| RGB | rgb(57, 131, 200) |
| HSL | hsl(209, 57%, 50%) |
| OKLCH | oklch(59.6% 0.129 249.5) |
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 #3983C8 | 3.99:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #3983C8 | 5.25:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #3983C8 text on white | 3.99:1 | AA large text | Lc 67.0 | Content text, not long reading |
| #3983C8 text on black | 5.25:1 | AA | Lc -34.7 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCF0
oklch(88.6% 0.035 248.2)
-
Step 300
300
#A2C5E8
oklch(81% 0.062 248.6)
-
Step 400
400
#6EA5DD
oklch(70.6% 0.101 249.9)
-
Step 500
500 (this color)
#3983C8
oklch(59.6% 0.129 249.5)
-
Step 600
600
#2077C1
oklch(55.7% 0.139 249.4)
-
Step 700
700
#1063A7
oklch(49.1% 0.131 249.9)
-
Step 800
800
#135187
oklch(42.7% 0.108 249.9)
-
Step 900
900
#18446C
oklch(37.8% 0.084 249.3)
-
Step 950
950
#10283F
oklch(27% 0.053 249.5)
#3983C8 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) | #6487CB | 0.045 |
| Deuteranopia (no green cones) | #4F79C7 | 0.031 |
| Tritanopia (no blue cones) | #00939C | 0.096 |
| Achromatopsia (no color) | #7F7F7F | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3983C8
#3983C8
oklch(59.6% 0.129 249.5)
- #AF6F03
#AF6F03
oklch(59.6% 0.128 69.9)
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 #3983C8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.020
- Cool Blue #4984B8 ΔE 0.028
- Steel Blue #4682B4 ΔE 0.031
- Windows Blue #3778BF ΔE 0.032
- Off Blue #5684AE ΔE 0.047
- Blue NCS #118AB2 ΔE 0.048
- Dark Sky Blue #448EE4 ΔE 0.050
- Nice Blue #107AB0 ΔE 0.050
Use #3983C8 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.