#1C347D
Closest named color: Marine Blue (#01386A). oklch(35.4% 0.128 266.1), rgb(28, 52, 125).
Aa
White text reads best on this color (11.43:1).
About this color
#1C347D is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.128 and its hue 266°. 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 11.43:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.83:1 |
| White text | 11.43:1 |
Values
| HEX | #1C347D |
| RGB | rgb(28, 52, 125) |
| HSL | hsl(225, 63%, 30%) |
| OKLCH | oklch(35.4% 0.128 266.1) |
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 #1C347D | 11.43:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #1C347D | 1.83:1 | Fails | Lc 8.0 | Not readable |
| #1C347D text on white | 11.43:1 | AAA | Lc 95.9 | Preferred for body text |
| #1C347D text on black | 1.83:1 | 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
#F1F5FE
oklch(97% 0.013 266.7)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FD
oklch(88.5% 0.053 266.4)
-
Step 300
300
#A4C0FF
oklch(81% 0.095 265.8)
-
Step 400
400
#749CFF
oklch(70.8% 0.152 266)
-
Step 500
500
#527FFE
oklch(63.2% 0.195 266.2)
-
Step 600
600
#3964ED
oklch(55.6% 0.212 266.2)
-
Step 700
700
#2C52CE
oklch(49.1% 0.196 266.1)
-
Step 800
800
#2544A7
oklch(42.8% 0.163 266.2)
-
Step 900
900 (this color)
#1C347D
oklch(35.4% 0.128 266.1)
-
Step 950
950
#14234D
oklch(27% 0.08 266.3)
#1C347D 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) | #003E80 | 0.029 |
| Deuteranopia (no green cones) | #00357C | 0.019 |
| Tritanopia (no blue cones) | #004653 | 0.101 |
| Achromatopsia (no color) | #3A3A3A | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C347D
#1C347D
oklch(35.4% 0.128 266.1)
- #4C3800
#4C3800
oklch(35.3% 0.072 86.2)
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 #1C347D, 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 0.043
- Marine #042E60 ΔE 0.058
- Cobalt #1E488F ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.067
- Midnight Blue #191970 ΔE 0.070
- Royal #0C1793 ΔE 0.072
- Dark Slate Blue #483D8B ΔE 0.074
Use #1C347D 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.