#3976B8
Closest named color: Windows Blue (#3778BF). oklch(55.7% 0.121 252.4), rgb(57, 118, 184).
Aa
White text reads best on this color (4.71:1).
About this color
#3976B8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.121 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.011 away. White text reads best on it, at 4.71:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.45:1 |
| White text | 4.71:1 |
Values
| HEX | #3976B8 |
| RGB | rgb(57, 118, 184) |
| HSL | hsl(211, 53%, 47%) |
| OKLCH | oklch(55.7% 0.121 252.4) |
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 #3976B8 | 4.71:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #3976B8 | 4.45:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #3976B8 text on white | 4.71:1 | AA | Lc 72.4 | Content text, not long reading |
| #3976B8 text on black | 4.45:1 | AA large text | Lc -29.2 | Dividers and decoration only |
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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CBDBED
oklch(88.5% 0.03 251.3)
-
Step 300
300
#A8C3E4
oklch(80.8% 0.055 253.6)
-
Step 400
400
#79A4D6
oklch(70.7% 0.087 252.7)
-
Step 500
500
#558DCB
oklch(63.2% 0.111 252.2)
-
Step 600
600 (this color)
#3976B8
oklch(55.7% 0.121 252.4)
-
Step 700
700
#2B639E
oklch(49.2% 0.112 252.1)
-
Step 800
800
#255180
oklch(42.8% 0.092 252.1)
-
Step 900
900
#234367
oklch(37.7% 0.073 252.7)
-
Step 950
950
#15283C
oklch(27.1% 0.045 250.9)
#3976B8 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) | #587ABB | 0.035 |
| Deuteranopia (no green cones) | #466EB7 | 0.023 |
| Tritanopia (no blue cones) | #00858E | 0.093 |
| Achromatopsia (no color) | #737373 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3976B8
#3976B8
oklch(55.7% 0.121 252.4)
- #9D6600
#9D6600
oklch(55.6% 0.119 72.5)
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 #3976B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.011
- Flat Blue #3C73A8 ΔE 0.025
- Nice Blue #107AB0 ΔE 0.028
- French Blue #436BAD ΔE 0.032
- Mid Blue #276AB3 ΔE 0.039
- Muted Blue #3B719F ΔE 0.039
- Steel Blue #4682B4 ΔE 0.040
- Dull Blue #49759C ΔE 0.045
Use #3976B8 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.