#2475D4
Closest named color: Windows Blue (#3778BF). oklch(56.6% 0.165 255.4), rgb(36, 117, 212).
Aa
White text reads best on this color (4.59:1).
About this color
#2475D4 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.165 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.037 away. White text reads best on it, at 4.59:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.57:1 |
| White text | 4.59:1 |
Values
| HEX | #2475D4 |
| RGB | rgb(36, 117, 212) |
| HSL | hsl(212, 71%, 49%) |
| OKLCH | oklch(56.6% 0.165 255.4) |
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 #2475D4 | 4.59:1 | AA | Lc -76.9 | Fine for body text |
| Black text on #2475D4 | 4.57:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #2475D4 text on white | 4.59:1 | AA | Lc 71.4 | Content text, not long reading |
| #2475D4 text on black | 4.57:1 | AA | Lc -30.3 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF5
oklch(88.5% 0.041 256.2)
-
Step 300
300
#A1C3F0
oklch(80.8% 0.074 255.6)
-
Step 400
400
#6DA3E9
oklch(70.7% 0.118 255.4)
-
Step 500
500
#438AE3
oklch(63.1% 0.152 255.4)
-
Step 600
600 (this color)
#2475D4
oklch(56.6% 0.165 255.4)
-
Step 700
700
#115FB5
oklch(49.1% 0.154 255.4)
-
Step 800
800
#134E92
oklch(42.7% 0.126 255.3)
-
Step 900
900
#184175
oklch(37.6% 0.1 256)
-
Step 950
950
#0F2744
oklch(27% 0.062 254.6)
#2475D4 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) | #427ED8 | 0.036 |
| Deuteranopia (no green cones) | #196ED2 | 0.021 |
| Tritanopia (no blue cones) | #008C9A | 0.125 |
| Achromatopsia (no color) | #757575 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2475D4
#2475D4
oklch(56.6% 0.165 255.4)
- #9E6A00
#9E6A00
oklch(56.5% 0.119 75.2)
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 #2475D4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.037
- Royal Blue #4169E1 ΔE 0.042
- Cerulean Blue #056EEE ΔE 0.046
- Water Blue #0E87CC ΔE 0.053
- Mid Blue #276AB3 ΔE 0.056
- Nice Blue #107AB0 ΔE 0.062
- Clear Blue #247AFD ΔE 0.063
- French Blue #436BAD ΔE 0.063
Use #2475D4 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.