#3980A3
Closest named color: Cerulean (#457B9D). oklch(57% 0.089 232.8), rgb(57, 128, 163).
Aa
Black text reads best on this color (4.79:1).
About this color
#3980A3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.089 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.016 away. Black text reads best on it, at 4.79:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.79:1 |
| White text | 4.38:1 |
Values
| HEX | #3980A3 |
| RGB | rgb(57, 128, 163) |
| HSL | hsl(200, 48%, 43%) |
| OKLCH | oklch(57% 0.089 232.8) |
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 #3980A3 | 4.38:1 | AA large text | Lc -75.6 | Fine for body text |
| Black text on #3980A3 | 4.79:1 | AA | Lc 33.9 | Non-text elements, placeholder text |
| #3980A3 text on white | 4.38:1 | AA large text | Lc 70.2 | Content text, not long reading |
| #3980A3 text on black | 4.79:1 | AA | Lc -31.5 | 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
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CBDCE6
oklch(88.5% 0.023 233.4)
-
Step 300
300
#A8C6D7
oklch(81% 0.04 232.8)
-
Step 400
400
#78A8C2
oklch(70.7% 0.064 232.5)
-
Step 500
500
#5392B3
oklch(63.1% 0.082 233)
-
Step 600
600 (this color)
#3980A3
oklch(57% 0.089 232.8)
-
Step 700
700
#266888
oklch(49% 0.083 233.3)
-
Step 800
800
#22556E
oklch(42.7% 0.068 232.9)
-
Step 900
900
#214659
oklch(37.6% 0.053 233)
-
Step 950
950
#142934
oklch(26.9% 0.034 232.8)
#3980A3 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) | #6F7FA5 | 0.059 |
| Deuteranopia (no green cones) | #6074A2 | 0.049 |
| Tritanopia (no blue cones) | #00898C | 0.057 |
| Achromatopsia (no color) | #797979 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3980A3
#3980A3
oklch(57% 0.089 232.8)
- #A06844
#A06844
oklch(56.9% 0.088 52.8)
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 #3980A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.016
- Stormy Blue #507B9C ΔE 0.024
- Steel Blue #4682B4 ΔE 0.030
- Dull Blue #49759C ΔE 0.032
- Teal Blue #01889F ΔE 0.033
- Blue NCS #118AB2 ΔE 0.033
- Off Blue #5684AE ΔE 0.036
- Cool Blue #4984B8 ΔE 0.037
Use #3980A3 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.