#2C3A6B
Closest named color: Marine Blue (#01386A). oklch(36.3% 0.086 269.7), rgb(44, 58, 107).
Aa
White text reads best on this color (10.91:1).
About this color
#2C3A6B is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.086 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.040 away. White text reads best on it, at 10.91:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.92:1 |
| White text | 10.91:1 |
Values
| HEX | #2C3A6B |
| RGB | rgb(44, 58, 107) |
| HSL | hsl(227, 42%, 30%) |
| OKLCH | oklch(36.3% 0.086 269.7) |
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 #2C3A6B | 10.91:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #2C3A6B | 1.92:1 | Fails | Lc 8.8 | Not readable |
| #2C3A6B text on white | 10.91:1 | AAA | Lc 95.1 | Preferred for body text |
| #2C3A6B text on black | 1.92:1 | Fails | Lc -7.5 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#CFD9F2
oklch(88.5% 0.036 268.3)
-
Step 300
300
#B0BFEC
oklch(80.9% 0.066 270.5)
-
Step 400
400
#879DE2
oklch(70.6% 0.104 270.1)
-
Step 500
500
#6A84D9
oklch(63.1% 0.132 269.5)
-
Step 600
600
#536CC7
oklch(55.7% 0.144 269.7)
-
Step 700
700
#4359AC
oklch(49% 0.135 269.7)
-
Step 800
800
#37498B
oklch(42.6% 0.111 269.7)
-
Step 900
900 (this color)
#2C3A6B
oklch(36.3% 0.086 269.7)
-
Step 950
950
#1C2541
oklch(27.1% 0.054 269.1)
#2C3A6B 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) | #25406D | 0.018 |
| Deuteranopia (no green cones) | #1D3A6A | 0.018 |
| Tritanopia (no blue cones) | #07454D | 0.078 |
| Achromatopsia (no color) | #3D3D3D | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C3A6B
#2C3A6B
oklch(36.3% 0.086 269.7)
- #4D3B00
#4D3B00
oklch(36.2% 0.074 89.3)
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 #2C3A6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.040
- Twilight Blue #0A437A ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.058
- Marine #042E60 ΔE 0.061
- Charcoal #264653 ΔE 0.064
- Cobalt #1E488F ΔE 0.068
Use #2C3A6B 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.