#2D4378
Closest named color: Twilight Blue (#0A437A). oklch(39.3% 0.094 265.3), rgb(45, 67, 120).
Aa
White text reads best on this color (9.60:1).
About this color
#2D4378 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.094 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.029 away. White text reads best on it, at 9.60:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.18:1 |
| White text | 9.60:1 |
Values
| HEX | #2D4378 |
| RGB | rgb(45, 67, 120) |
| HSL | hsl(222, 45%, 32%) |
| OKLCH | oklch(39.3% 0.094 265.3) |
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 #2D4378 | 9.60:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #2D4378 | 2.18:1 | Fails | Lc 11.9 | Not readable |
| #2D4378 text on white | 9.60:1 | AAA | Lc 92.1 | Preferred for body text |
| #2D4378 text on black | 2.18:1 | Fails | Lc -10.3 | 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
#CDD9F4
oklch(88.5% 0.039 266.5)
-
Step 300
300
#ABC0EF
oklch(80.8% 0.071 266)
-
Step 400
400
#7E9FE7
oklch(70.7% 0.112 264.9)
-
Step 500
500
#5F85E0
oklch(63.1% 0.144 265.4)
-
Step 600
600
#466DCE
oklch(55.7% 0.156 265.2)
-
Step 700
700
#385AB2
oklch(49.1% 0.145 265.5)
-
Step 800
800
#2E4A90
oklch(42.6% 0.12 265.3)
-
Step 900
900 (this color)
#2D4378
oklch(39.3% 0.094 265.3)
-
Step 950
950
#182543
oklch(27% 0.059 265)
#2D4378 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) | #2B497A | 0.017 |
| Deuteranopia (no green cones) | #214277 | 0.014 |
| Tritanopia (no blue cones) | #004F57 | 0.083 |
| Achromatopsia (no color) | #454545 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D4378
#2D4378
oklch(39.3% 0.094 265.3)
- #594200
#594200
oklch(39.3% 0.081 86)
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 #2D4378, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.029
- Cobalt #1E488F ΔE 0.040
- Light Navy #155084 ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.053
- Dusk Blue #26538D ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.054
- Marine Blue #01386A ΔE 0.059
Use #2D4378 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.