#2D305D
Closest named color: Prussian Blue (#1D3557). oklch(33.1% 0.079 278.3), rgb(45, 48, 93).
Aa
White text reads best on this color (12.40:1).
About this color
#2D305D is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.079 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.029 away. White text reads best on it, at 12.40:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.69:1 |
| White text | 12.40:1 |
Values
| HEX | #2D305D |
| RGB | rgb(45, 48, 93) |
| HSL | hsl(236, 35%, 27%) |
| OKLCH | oklch(33.1% 0.079 278.3) |
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 #2D305D | 12.40:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #2D305D | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #2D305D text on white | 12.40:1 | AAA | Lc 98.1 | Preferred for body text |
| #2D305D text on black | 1.69:1 | Fails | Lc 0.0 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F6
oklch(93.6% 0.018 279.1)
-
Step 200
200
#D4D8EF
oklch(88.6% 0.032 277.9)
-
Step 300
300
#B7BEE7
oklch(81% 0.058 277.4)
-
Step 400
400
#939BDB
oklch(70.8% 0.094 278.2)
-
Step 500
500
#7981D1
oklch(63.1% 0.12 278)
-
Step 600
600
#6369BE
oklch(55.6% 0.13 278.2)
-
Step 700
700
#5257A4
oklch(49.1% 0.122 278.1)
-
Step 800
800
#434785
oklch(42.6% 0.102 278.4)
-
Step 900
900 (this color)
#2D305D
oklch(33.1% 0.079 278.3)
-
Step 950
950
#21243E
oklch(27.1% 0.048 277.6)
#2D305D 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) | #1E365F | 0.025 |
| Deuteranopia (no green cones) | #1A325C | 0.026 |
| Tritanopia (no blue cones) | #1B3A42 | 0.069 |
| Achromatopsia (no color) | #343434 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D305D
#2D305D
oklch(33.1% 0.079 278.3)
- #3F3500
#3F3500
oklch(33% 0.068 97.5)
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 #2D305D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.029
- Marine #042E60 ΔE 0.046
- Marine Blue #01386A ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.053
- Gunmetal #293241 ΔE 0.053
- Midnight Green #073B4C ΔE 0.063
- Onyx #343A40 ΔE 0.069
Use #2D305D 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.