#2C307D
Closest named color: Marine Blue (#01386A). oklch(35.5% 0.128 275.5), rgb(44, 48, 125).
Aa
White text reads best on this color (11.50:1).
About this color
#2C307D is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.128 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.055 away. White text reads best on it, at 11.50:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.82:1 |
| White text | 11.50:1 |
Values
| HEX | #2C307D |
| RGB | rgb(44, 48, 125) |
| HSL | hsl(237, 48%, 33%) |
| OKLCH | oklch(35.5% 0.128 275.5) |
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 #2C307D | 11.50:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #2C307D | 1.82:1 | Fails | Lc 7.8 | Not readable |
| #2C307D text on white | 11.50:1 | AAA | Lc 96.1 | Preferred for body text |
| #2C307D text on black | 1.82:1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CFD7FD
oklch(88.5% 0.053 275.9)
-
Step 300
300
#AFBCFF
oklch(80.9% 0.096 275.6)
-
Step 400
400
#8796FF
oklch(70.7% 0.154 275.6)
-
Step 500
500
#6C77FD
oklch(63% 0.197 275.7)
-
Step 600
600
#575CED
oklch(55.7% 0.214 275.5)
-
Step 700
700
#484ACE
oklch(49.2% 0.199 275.6)
-
Step 800
800
#3A3EA6
oklch(42.7% 0.164 275.3)
-
Step 900
900 (this color)
#2C307D
oklch(35.5% 0.128 275.5)
-
Step 950
950
#1C214D
oklch(27.1% 0.08 274.8)
#2C307D 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) | #003D80 | 0.045 |
| Deuteranopia (no green cones) | #00367B | 0.040 |
| Tritanopia (no blue cones) | #004351 | 0.109 |
| Achromatopsia (no color) | #393939 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C307D
#2C307D
oklch(35.5% 0.128 275.5)
- #483B00
#483B00
oklch(35.6% 0.073 95)
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 #2C307D, closest first.
No curated palette has a color within ΔE 0.04 of #2C307D.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.055
- Twilight Blue #0A437A ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.064
- Cobalt #1E488F ΔE 0.068
- Marine #042E60 ΔE 0.068
- Midnight Blue #191970 ΔE 0.069
- Prussian Blue #1D3557 ΔE 0.073
- Blueberry #464196 ΔE 0.075
Use #2C307D 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.