#2D73B4
Closest named color: Flat Blue (#3C73A8). oklch(54.3% 0.123 249.8), rgb(45, 115, 180).
Aa
White text reads best on this color (4.97:1).
About this color
#2D73B4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.123 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.021 away. White text reads best on it, at 4.97:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.22:1 |
| White text | 4.97:1 |
Values
| HEX | #2D73B4 |
| RGB | rgb(45, 115, 180) |
| HSL | hsl(209, 60%, 44%) |
| OKLCH | oklch(54.3% 0.123 249.8) |
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 #2D73B4 | 4.97:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #2D73B4 | 4.22:1 | AA large text | Lc 30.0 | Non-text elements, placeholder text |
| #2D73B4 text on white | 4.97:1 | AA | Lc 74.1 | Content text, not long reading |
| #2D73B4 text on black | 4.22:1 | AA large text | Lc -27.6 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADBED
oklch(88.4% 0.031 249.7)
-
Step 300
300
#A6C4E4
oklch(80.9% 0.056 250.2)
-
Step 400
400
#75A5D6
oklch(70.7% 0.089 249.7)
-
Step 500
500
#508ECB
oklch(63.2% 0.113 249.7)
-
Step 600
600 (this color)
#2D73B4
oklch(54.3% 0.123 249.8)
-
Step 700
700
#23649F
oklch(49.2% 0.115 249.6)
-
Step 800
800
#1F5181
oklch(42.6% 0.096 250.4)
-
Step 900
900
#1F4467
oklch(37.7% 0.074 249.2)
-
Step 950
950
#13283C
oklch(27% 0.046 248.8)
#2D73B4 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) | #5577B7 | 0.041 |
| Deuteranopia (no green cones) | #416AB3 | 0.028 |
| Tritanopia (no blue cones) | #00828B | 0.090 |
| Achromatopsia (no color) | #707070 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D73B4
#2D73B4
oklch(54.3% 0.123 249.8)
- #9B6100
#9B6100
oklch(54.4% 0.118 69.5)
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 #2D73B4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.021
- Windows Blue #3778BF ΔE 0.023
- Nice Blue #107AB0 ΔE 0.024
- French Blue #436BAD ΔE 0.027
- Mid Blue #276AB3 ΔE 0.027
- Muted Blue #3B719F ΔE 0.033
- Ocean Blue #03719C ΔE 0.044
- Dull Blue #49759C ΔE 0.045
Use #2D73B4 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.