#3983A6
Closest named color: Cerulean (#457B9D). oklch(57.8% 0.09 231.8), rgb(57, 131, 166).
Aa
Black text reads best on this color (4.97:1).
About this color
#3983A6 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.090 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.024 away. Black text reads best on it, at 4.97:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.97:1 |
| White text | 4.22:1 |
Values
| HEX | #3983A6 |
| RGB | rgb(57, 131, 166) |
| HSL | hsl(199, 49%, 44%) |
| OKLCH | oklch(57.8% 0.09 231.8) |
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 #3983A6 | 4.22:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #3983A6 | 4.97:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #3983A6 text on white | 4.22:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #3983A6 text on black | 4.97:1 | AA | Lc -32.7 | 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 600.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2EBF0
oklch(93.5% 0.012 231.7)
-
Step 200
200
#CBDCE6
oklch(88.5% 0.023 233.4)
-
Step 300
300
#A7C6D7
oklch(80.9% 0.041 231.9)
-
Step 400
400
#77A8C2
oklch(70.6% 0.065 232)
-
Step 500
500
#5192B3
oklch(63% 0.083 232.3)
-
Step 600
600 (this color)
#3983A6
oklch(57.8% 0.09 231.8)
-
Step 700
700
#236988
oklch(49.2% 0.084 231.4)
-
Step 800
800
#1F556E
oklch(42.5% 0.07 231.8)
-
Step 900
900
#204759
oklch(37.8% 0.054 230.4)
-
Step 950
950
#142934
oklch(26.9% 0.034 232.8)
#3983A6 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) | #7281A8 | 0.061 |
| Deuteranopia (no green cones) | #6276A5 | 0.052 |
| Tritanopia (no blue cones) | #008D8F | 0.058 |
| Achromatopsia (no color) | #7B7B7B | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3983A6
#3983A6
oklch(57.8% 0.09 231.8)
- #A46A46
#A46A46
oklch(57.8% 0.09 52)
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 #3983A6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.024
- Steel Blue #4682B4 ΔE 0.026
- Blue NCS #118AB2 ΔE 0.027
- Stormy Blue #507B9C ΔE 0.029
- Teal Blue #01889F ΔE 0.030
- Off Blue #5684AE ΔE 0.031
- Cool Blue #4984B8 ΔE 0.033
- Dusty Blue #5A86AD ΔE 0.036
Use #3983A6 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.