#3372C0
Closest named color: Windows Blue (#3778BF). oklch(55% 0.138 255.3), rgb(51, 114, 192).
Aa
White text reads best on this color (4.87:1).
About this color
#3372C0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.138 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.018 away. White text reads best on it, at 4.87:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.30:1 |
| White text | 4.87:1 |
Values
| HEX | #3372C0 |
| RGB | rgb(51, 114, 192) |
| HSL | hsl(213, 58%, 48%) |
| OKLCH | oklch(55% 0.138 255.3) |
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 #3372C0 | 4.87:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #3372C0 | 4.30:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #3372C0 text on white | 4.87:1 | AA | Lc 73.4 | Content text, not long reading |
| #3372C0 text on black | 4.30:1 | AA large text | Lc -28.3 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBF0
oklch(88.5% 0.034 253.7)
-
Step 300
300
#A6C3E9
oklch(80.9% 0.063 255.3)
-
Step 400
400
#76A3DE
oklch(70.7% 0.1 255.5)
-
Step 500
500
#528BD5
oklch(63.1% 0.127 255.6)
-
Step 600
600 (this color)
#3372C0
oklch(55% 0.138 255.3)
-
Step 700
700
#2761A7
oklch(49.2% 0.127 255.1)
-
Step 800
800
#224F88
oklch(42.7% 0.107 255.7)
-
Step 900
900
#21426C
oklch(37.6% 0.082 255.4)
-
Step 950
950
#142740
oklch(27% 0.053 255.8)
#3372C0 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) | #4D78C3 | 0.032 |
| Deuteranopia (no green cones) | #366BBE | 0.019 |
| Tritanopia (no blue cones) | #00848F | 0.107 |
| Achromatopsia (no color) | #717171 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3372C0
#3372C0
oklch(55% 0.138 255.3)
- #986600
#986600
oklch(55% 0.116 75.3)
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 #3372C0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.018
- Mid Blue #276AB3 ΔE 0.031
- French Blue #436BAD ΔE 0.033
- Flat Blue #3C73A8 ΔE 0.039
- Nice Blue #107AB0 ΔE 0.041
- Muted Blue #3B719F ΔE 0.052
- Water Blue #0E87CC ΔE 0.057
- Steel Blue #4682B4 ΔE 0.057
Use #3372C0 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.