#3984AB
Closest named color: Steel Blue (#4682B4). oklch(58.3% 0.095 234.4), rgb(57, 132, 171).
Aa
Black text reads best on this color (5.06:1).
About this color
#3984AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.095 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.020 away. Black text reads best on it, at 5.06:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 5.06:1 |
| White text | 4.14:1 |
Values
| HEX | #3984AB |
| RGB | rgb(57, 132, 171) |
| HSL | hsl(201, 50%, 45%) |
| OKLCH | oklch(58.3% 0.095 234.4) |
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 #3984AB | 4.14:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #3984AB | 5.06:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #3984AB text on white | 4.14:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #3984AB text on black | 5.06:1 | AA | Lc -33.4 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A7C6D8
oklch(81% 0.042 233.5)
-
Step 400
400
#76A8C5
oklch(70.7% 0.068 234.5)
-
Step 500
500
#5092B6
oklch(63.1% 0.087 234.3)
-
Step 600
600 (this color)
#3984AB
oklch(58.3% 0.095 234.4)
-
Step 700
700
#21688B
oklch(49% 0.088 234.5)
-
Step 800
800
#1E5571
oklch(42.7% 0.073 234.5)
-
Step 900
900
#1F465B
oklch(37.6% 0.057 234.6)
-
Step 950
950
#132935
oklch(26.9% 0.036 234.1)
#3984AB 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) | #7183AD | 0.059 |
| Deuteranopia (no green cones) | #6177AA | 0.051 |
| Tritanopia (no blue cones) | #008E91 | 0.062 |
| Achromatopsia (no color) | #7C7C7C | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3984AB
#3984AB
oklch(58.3% 0.095 234.4)
- #A76B42
#A76B42
oklch(58.3% 0.095 54.1)
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 #3984AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.020
- Blue NCS #118AB2 ΔE 0.023
- Cool Blue #4984B8 ΔE 0.026
- Off Blue #5684AE ΔE 0.027
- Cerulean #457B9D ΔE 0.029
- Dusty Blue #5A86AD ΔE 0.033
- Stormy Blue #507B9C ΔE 0.033
- Teal Blue #01889F ΔE 0.034
Use #3984AB 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.