#2D4573
Closest named color: Twilight Blue (#0A437A). oklch(39.5% 0.084 262.4), rgb(45, 69, 115).
Aa
White text reads best on this color (9.50:1).
About this color
#2D4573 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.084 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.032 away. White text reads best on it, at 9.50:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.21:1 |
| White text | 9.50:1 |
Values
| HEX | #2D4573 |
| RGB | rgb(45, 69, 115) |
| HSL | hsl(219, 44%, 31%) |
| OKLCH | oklch(39.5% 0.084 262.4) |
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 #2D4573 | 9.50:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #2D4573 | 2.21:1 | Fails | Lc 12.1 | Not readable |
| #2D4573 text on white | 9.50:1 | AAA | Lc 91.8 | Preferred for body text |
| #2D4573 text on black | 2.21:1 | Fails | Lc -10.6 | Not readable |
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 900.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ABC1EA
oklch(80.8% 0.063 262.8)
-
Step 400
400
#7EA0E0
oklch(70.6% 0.102 262.6)
-
Step 500
500
#5E88D7
oklch(63.2% 0.128 262.1)
-
Step 600
600
#4570C4
oklch(55.6% 0.139 262.4)
-
Step 700
700
#365DA9
oklch(49% 0.13 262.2)
-
Step 800
800
#2D4D89
oklch(42.8% 0.107 261.8)
-
Step 900
900 (this color)
#2D4573
oklch(39.5% 0.084 262.4)
-
Step 950
950
#182640
oklch(27% 0.052 262)
#2D4573 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) | #324975 | 0.014 |
| Deuteranopia (no green cones) | #294372 | 0.008 |
| Tritanopia (no blue cones) | #004F56 | 0.074 |
| Achromatopsia (no color) | #464646 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D4573
#2D4573
oklch(39.5% 0.084 262.4)
- #5C4100
#5C4100
oklch(39.5% 0.081 81.8)
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 #2D4573, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.032
- Light Navy #155084 ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.043
- Cobalt #1E488F ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.050
- Dusk Blue #26538D ΔE 0.054
- Charcoal #264653 ΔE 0.058
- Marine Blue #01386A ΔE 0.060
Use #2D4573 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.