#1C2D73
Closest named color: Marine Blue (#01386A). oklch(33% 0.122 268.4), rgb(28, 45, 115).
Aa
White text reads best on this color (12.55:1).
About this color
#1C2D73 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.122 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.039 away. White text reads best on it, at 12.55:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.67:1 |
| White text | 12.55:1 |
Values
| HEX | #1C2D73 |
| RGB | rgb(28, 45, 115) |
| HSL | hsl(228, 61%, 28%) |
| OKLCH | oklch(33% 0.122 268.4) |
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 #1C2D73 | 12.55:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #1C2D73 | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #1C2D73 text on white | 12.55:1 | AAA | Lc 98.1 | Preferred for body text |
| #1C2D73 text on black | 1.67:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CBD9FC
oklch(88.6% 0.051 268.1)
-
Step 300
300
#A8BFFD
oklch(81% 0.092 268.6)
-
Step 400
400
#7A9BFC
oklch(70.7% 0.147 268.3)
-
Step 500
500
#5B7EF9
oklch(63.1% 0.187 268.6)
-
Step 600
600
#4364E8
oklch(55.7% 0.203 268.3)
-
Step 700
700
#3651CA
oklch(49% 0.19 268.7)
-
Step 800
800
#2C44A3
oklch(42.8% 0.156 268.2)
-
Step 900
900 (this color)
#1C2D73
oklch(33% 0.122 268.4)
-
Step 950
950
#17234C
oklch(27.1% 0.077 268.6)
#1C2D73 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) | #003875 | 0.032 |
| Deuteranopia (no green cones) | #003072 | 0.022 |
| Tritanopia (no blue cones) | #003E4B | 0.097 |
| Achromatopsia (no color) | #333333 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C2D73
#1C2D73
oklch(33% 0.122 268.4)
- #443300
#443300
oklch(33.1% 0.068 88.1)
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 #1C2D73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.039
- Marine #042E60 ΔE 0.040
- Midnight Blue #191970 ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.057
- Twilight Blue #0A437A ΔE 0.061
- Royal #0C1793 ΔE 0.071
- Dark Blue Grey #1F3B4D ΔE 0.086
- Cobalt #1E488F ΔE 0.086
Use #1C2D73 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.