#3073CC
Closest named color: Windows Blue (#3778BF). oklch(55.9% 0.154 256.8), rgb(48, 115, 204).
Aa
White text reads best on this color (4.71:1).
About this color
#3073CC is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.154 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.027 away. White text reads best on it, at 4.71:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.44:1 |
| White text | 4.71:1 |
Values
| HEX | #3073CC |
| RGB | rgb(48, 115, 204) |
| HSL | hsl(214, 62%, 49%) |
| OKLCH | oklch(55.9% 0.154 256.8) |
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 #3073CC | 4.71:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #3073CC | 4.44:1 | AA large text | Lc 31.7 | Non-text elements, placeholder text |
| #3073CC text on white | 4.71:1 | AA | Lc 72.4 | Content text, not long reading |
| #3073CC text on black | 4.44:1 | AA large text | Lc -29.3 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A4C3ED
oklch(80.9% 0.069 256.1)
-
Step 400
400
#73A3E5
oklch(70.8% 0.11 256.5)
-
Step 500
500
#4D8ADD
oklch(63.1% 0.141 256.6)
-
Step 600
600 (this color)
#3073CC
oklch(55.9% 0.154 256.8)
-
Step 700
700
#215FAF
oklch(49.1% 0.142 256.6)
-
Step 800
800
#1E4E8E
oklch(42.7% 0.118 256.8)
-
Step 900
900
#1E4171
oklch(37.6% 0.092 256.9)
-
Step 950
950
#122742
oklch(27.1% 0.057 255.5)
#3073CC 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) | #467BCF | 0.031 |
| Deuteranopia (no green cones) | #286DCA | 0.018 |
| Tritanopia (no blue cones) | #008895 | 0.119 |
| Achromatopsia (no color) | #737373 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3073CC
#3073CC
oklch(55.9% 0.154 256.8)
- #9A6900
#9A6900
oklch(55.8% 0.117 76.7)
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 #3073CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.027
- Royal Blue #4169E1 ΔE 0.045
- Mid Blue #276AB3 ΔE 0.045
- French Blue #436BAD ΔE 0.050
- Nice Blue #107AB0 ΔE 0.054
- Water Blue #0E87CC ΔE 0.055
- Flat Blue #3C73A8 ΔE 0.057
- Cerulean Blue #056EEE ΔE 0.057
Use #3073CC 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.