#2D457B
Closest named color: Twilight Blue (#0A437A). oklch(40% 0.096 264.4), rgb(45, 69, 123).
Aa
White text reads best on this color (9.33:1).
About this color
#2D457B is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.096 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.031 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.24:1 |
| White text | 9.33:1 |
Values
| HEX | #2D457B |
| RGB | rgb(45, 69, 123) |
| HSL | hsl(222, 46%, 33%) |
| OKLCH | oklch(40% 0.096 264.4) |
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 #2D457B | 9.33:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #2D457B | 2.24:1 | Fails | Lc 12.6 | Not readable |
| #2D457B text on white | 9.33:1 | AAA | Lc 91.4 | Preferred for body text |
| #2D457B text on black | 2.24:1 | Fails | Lc -11.0 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCD9F4
oklch(88.4% 0.04 265.1)
-
Step 300
300
#AAC1F0
oklch(81% 0.071 264.4)
-
Step 400
400
#7C9FE9
oklch(70.7% 0.116 264.3)
-
Step 500
500
#5C85E2
oklch(63.1% 0.148 264.6)
-
Step 600
600
#436DD0
oklch(55.7% 0.16 264.5)
-
Step 700
700
#355AB4
oklch(49.1% 0.149 264.7)
-
Step 800
800
#2C4A92
oklch(42.7% 0.124 264.7)
-
Step 900
900 (this color)
#2D457B
oklch(40% 0.096 264.4)
-
Step 950
950
#172544
oklch(27% 0.061 264.4)
#2D457B 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) | #2D4B7D | 0.018 |
| Deuteranopia (no green cones) | #22437A | 0.014 |
| Tritanopia (no blue cones) | #00515A | 0.082 |
| Achromatopsia (no color) | #474747 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D457B
#2D457B
oklch(40% 0.096 264.4)
- #5C4300
#5C4300
oklch(39.9% 0.082 84.4)
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 #2D457B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.031
- Cobalt #1E488F ΔE 0.035
- Light Navy #155084 ΔE 0.035
- Dusk Blue #26538D ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.047
- Dark Slate Blue #483D8B ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.057
- Blueberry #464196 ΔE 0.059
Use #2D457B 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.