#5976B3
Closest named color: Windows Blue (#3778BF). oklch(57% 0.101 264.1), rgb(89, 118, 179).
Aa
Black text reads best on this color (4.66:1).
About this color
#5976B3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.101 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.036 away. Black text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.66:1 |
| White text | 4.49:1 |
Values
| HEX | #5976B3 |
| RGB | rgb(89, 118, 179) |
| HSL | hsl(221, 37%, 53%) |
| OKLCH | oklch(57% 0.101 264.1) |
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 #5976B3 | 4.49:1 | AA large text | Lc -76.6 | Fine for body text |
| Black text on #5976B3 | 4.66:1 | AA | Lc 32.9 | Non-text elements, placeholder text |
| #5976B3 text on white | 4.49:1 | AA large text | Lc 71.1 | Content text, not long reading |
| #5976B3 text on black | 4.66:1 | AA | Lc -30.5 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D1D9EA
oklch(88.4% 0.025 265.6)
-
Step 300
300
#B2C1DF
oklch(80.9% 0.046 264.3)
-
Step 400
400
#8AA1CF
oklch(70.8% 0.073 263.9)
-
Step 500
500
#6D89C2
oklch(63.2% 0.092 263.9)
-
Step 600
600 (this color)
#5976B3
oklch(57% 0.101 264.1)
-
Step 700
700
#455F96
oklch(49.1% 0.094 264.1)
-
Step 800
800
#394E7A
oklch(42.8% 0.078 264)
-
Step 900
900
#314162
oklch(37.7% 0.061 264)
-
Step 950
950
#1D2639
oklch(27% 0.038 264.5)
#5976B3 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) | #5F7BB6 | 0.017 |
| Deuteranopia (no green cones) | #5573B2 | 0.010 |
| Tritanopia (no blue cones) | #31838C | 0.090 |
| Achromatopsia (no color) | #777777 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5976B3
#5976B3
oklch(57% 0.101 264.1)
- #937226
#937226
oklch(57% 0.101 84.5)
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 #5976B3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.036
- Steel Blue #4682B4 ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.038
- Cool Blue #4984B8 ΔE 0.039
- Dull Blue #49759C ΔE 0.042
- Off Blue #5684AE ΔE 0.043
- French Blue #436BAD ΔE 0.043
- Stormy Blue #507B9C ΔE 0.044
Use #5976B3 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.