#3D83CB
Closest named color: Water Blue (#0E87CC). oklch(59.9% 0.131 251.5), rgb(61, 131, 203).
Aa
Black text reads best on this color (5.30:1).
About this color
#3D83CB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.131 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.023 away. Black text reads best on it, at 5.30:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.30:1 |
| White text | 3.95:1 |
Values
| HEX | #3D83CB |
| RGB | rgb(61, 131, 203) |
| HSL | hsl(210, 58%, 52%) |
| OKLCH | oklch(59.9% 0.131 251.5) |
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 #3D83CB | 3.95:1 | AA large text | Lc -72.1 | Content text, not long reading |
| Black text on #3D83CB | 5.30:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #3D83CB text on white | 3.95:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #3D83CB text on black | 5.30:1 | AA | Lc -35.0 | 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
#C9DBF1
oklch(88.5% 0.036 253.5)
-
Step 300
300
#A3C4E9
oklch(80.9% 0.064 251.5)
-
Step 400
400
#70A5DF
oklch(70.8% 0.102 251.5)
-
Step 500
500 (this color)
#3D83CB
oklch(59.9% 0.131 251.5)
-
Step 600
600
#2575C3
oklch(55.5% 0.143 251.7)
-
Step 700
700
#1662A8
oklch(49% 0.132 251.5)
-
Step 800
800
#165088
oklch(42.5% 0.11 251.6)
-
Step 900
900
#1A436D
oklch(37.6% 0.085 251.6)
-
Step 950
950
#102840
oklch(27.1% 0.054 250.5)
#3D83CB 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) | #6387CE | 0.041 |
| Deuteranopia (no green cones) | #4E7ACA | 0.026 |
| Tritanopia (no blue cones) | #00949D | 0.101 |
| Achromatopsia (no color) | #808080 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D83CB
#3D83CB
oklch(59.9% 0.131 251.5)
- #AF7100
#AF7100
oklch(60% 0.129 71.6)
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 #3D83CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.023
- Cool Blue #4984B8 ΔE 0.031
- Windows Blue #3778BF ΔE 0.034
- Steel Blue #4682B4 ΔE 0.035
- Dark Sky Blue #448EE4 ΔE 0.046
- Off Blue #5684AE ΔE 0.050
- Blue NCS #118AB2 ΔE 0.053
- Dusty Blue #5A86AD ΔE 0.055
Use #3D83CB 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.