#3E83C3
Closest named color: Cool Blue (#4984B8). oklch(59.5% 0.12 249), rgb(62, 131, 195).
Aa
Black text reads best on this color (5.23:1).
About this color
#3E83C3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.120 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.020 away. Black text reads best on it, at 5.23:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.23:1 |
| White text | 4.00:1 |
Values
| HEX | #3E83C3 |
| RGB | rgb(62, 131, 195) |
| HSL | hsl(209, 53%, 50%) |
| OKLCH | oklch(59.5% 0.12 249) |
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 #3E83C3 | 4.00:1 | AA large text | Lc -72.6 | Content text, not long reading |
| Black text on #3E83C3 | 5.23:1 | AA | Lc 37.0 | Non-text elements, placeholder text |
| #3E83C3 text on white | 4.00:1 | AA large text | Lc 67.1 | Content text, not long reading |
| #3E83C3 text on black | 5.23:1 | AA | Lc -34.6 | 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
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DBEE
oklch(88.4% 0.033 249.6)
-
Step 300
300
#A4C4E6
oklch(80.8% 0.059 250.1)
-
Step 400
400
#71A5D9
oklch(70.6% 0.095 249.3)
-
Step 500
500 (this color)
#3E83C3
oklch(59.5% 0.12 249)
-
Step 600
600
#2877BC
oklch(55.6% 0.131 249.1)
-
Step 700
700
#1964A2
oklch(49.2% 0.122 248.8)
-
Step 800
800
#185283
oklch(42.8% 0.1 248.5)
-
Step 900
900
#1B4469
oklch(37.7% 0.078 248.6)
-
Step 950
950
#11283E
oklch(27% 0.05 249.3)
#3E83C3 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) | #6786C6 | 0.044 |
| Deuteranopia (no green cones) | #5479C2 | 0.032 |
| Tritanopia (no blue cones) | #00929A | 0.091 |
| Achromatopsia (no color) | #7F7F7F | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E83C3
#3E83C3
oklch(59.5% 0.12 249)
- #AC701B
#AC701B
oklch(59.5% 0.12 69.5)
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 #3E83C3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.020
- Steel Blue #4682B4 ΔE 0.023
- Water Blue #0E87CC ΔE 0.025
- Windows Blue #3778BF ΔE 0.032
- Off Blue #5684AE ΔE 0.039
- Blue NCS #118AB2 ΔE 0.043
- Dusty Blue #5A86AD ΔE 0.045
- Nice Blue #107AB0 ΔE 0.048
Use #3E83C3 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.