#2576BF
Closest named color: Windows Blue (#3778BF). oklch(55.5% 0.137 250.1), rgb(37, 118, 191).
Aa
White text reads best on this color (4.74:1).
About this color
#2576BF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.137 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.014 away. White text reads best on it, at 4.74:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.42:1 |
| White text | 4.74:1 |
Values
| HEX | #2576BF |
| RGB | rgb(37, 118, 191) |
| HSL | hsl(208, 68%, 45%) |
| OKLCH | oklch(55.5% 0.137 250.1) |
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 #2576BF | 4.74:1 | AA | Lc -78.0 | Fine for body text |
| Black text on #2576BF | 4.42:1 | AA large text | Lc 31.5 | Non-text elements, placeholder text |
| #2576BF text on white | 4.74:1 | AA | Lc 72.5 | Content text, not long reading |
| #2576BF text on black | 4.42:1 | AA large text | Lc -29.1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBEF
oklch(88.4% 0.034 251)
-
Step 300
300
#A3C4E8
oklch(80.8% 0.062 250.8)
-
Step 400
400
#70A5DC
oklch(70.7% 0.099 250.2)
-
Step 500
500
#488ED2
oklch(63.2% 0.125 249.8)
-
Step 600
600 (this color)
#2576BF
oklch(55.5% 0.137 250.1)
-
Step 700
700
#1763A5
oklch(49.1% 0.127 250.1)
-
Step 800
800
#175186
oklch(42.7% 0.106 250.3)
-
Step 900
900
#1A446B
oklch(37.8% 0.082 249.5)
-
Step 950
950
#11283F
oklch(27.1% 0.052 250.3)
#2576BF 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) | #537AC2 | 0.043 |
| Deuteranopia (no green cones) | #3B6DBE | 0.027 |
| Tritanopia (no blue cones) | #008791 | 0.099 |
| Achromatopsia (no color) | #737373 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2576BF
#2576BF
oklch(55.5% 0.137 250.1)
- #9F6400
#9F6400
oklch(55.5% 0.12 69.8)
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 #2576BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.014
- Nice Blue #107AB0 ΔE 0.030
- Mid Blue #276AB3 ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.037
- French Blue #436BAD ΔE 0.040
- Water Blue #0E87CC ΔE 0.047
- Muted Blue #3B719F ΔE 0.050
- Steel Blue #4682B4 ΔE 0.051
Use #2576BF 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.