#2D3D70
Closest named color: Twilight Blue (#0A437A). oklch(37.4% 0.09 268.7), rgb(45, 61, 112).
Aa
White text reads best on this color (10.43:1).
About this color
#2D3D70 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.090 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.034 away. White text reads best on it, at 10.43:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.01:1 |
| White text | 10.43:1 |
Values
| HEX | #2D3D70 |
| RGB | rgb(45, 61, 112) |
| HSL | hsl(226, 43%, 31%) |
| OKLCH | oklch(37.4% 0.09 268.7) |
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 #2D3D70 | 10.43:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #2D3D70 | 2.01:1 | Fails | Lc 9.9 | Not readable |
| #2D3D70 text on white | 10.43:1 | AAA | Lc 94.0 | Preferred for body text |
| #2D3D70 text on black | 2.01:1 | Fails | Lc -8.5 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CFD9F3
oklch(88.6% 0.037 268.9)
-
Step 300
300
#AEC0ED
oklch(81% 0.067 267.8)
-
Step 400
400
#859EE4
oklch(70.8% 0.107 268.6)
-
Step 500
500
#6784DC
oklch(63.1% 0.137 268.5)
-
Step 600
600
#4F6CCA
oklch(55.7% 0.149 268.4)
-
Step 700
700
#4059AF
oklch(49.1% 0.14 268.6)
-
Step 800
800
#35498D
oklch(42.6% 0.115 268.8)
-
Step 900
900 (this color)
#2D3D70
oklch(37.4% 0.09 268.7)
-
Step 950
950
#1B2542
oklch(27.1% 0.056 268.2)
#2D3D70 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) | #274372 | 0.018 |
| Deuteranopia (no green cones) | #1E3D6F | 0.018 |
| Tritanopia (no blue cones) | #014851 | 0.080 |
| Achromatopsia (no color) | #404040 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3D70
#2D3D70
oklch(37.4% 0.09 268.7)
- #513E00
#513E00
oklch(37.4% 0.076 89.1)
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 #2D3D70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.034
- Marine Blue #01386A ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.053
- Cobalt #1E488F ΔE 0.057
- Light Navy #155084 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.062
- Charcoal #264653 ΔE 0.065
Use #2D3D70 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.