#12376E
Closest named color: Marine Blue (#01386A). oklch(34.4% 0.104 258.6), rgb(18, 55, 110).
Aa
White text reads best on this color (11.68:1).
About this color
#12376E is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.104 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.013 away. White text reads best on it, at 11.68:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.79:1 |
| White text | 11.68:1 |
Values
| HEX | #12376E |
| RGB | rgb(18, 55, 110) |
| HSL | hsl(216, 72%, 25%) |
| OKLCH | oklch(34.4% 0.104 258.6) |
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 #12376E | 11.68:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #12376E | 1.79:1 | Fails | Lc 7.4 | Not readable |
| #12376E text on white | 11.68:1 | AAA | Lc 96.5 | Preferred for body text |
| #12376E text on black | 1.79:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C8DBF6
oklch(88.6% 0.043 257.1)
-
Step 300
300
#A2C2F4
oklch(80.8% 0.079 259.2)
-
Step 400
400
#6FA1EE
oklch(70.6% 0.126 258.8)
-
Step 500
500
#4888E8
oklch(63.1% 0.159 258.4)
-
Step 600
600
#296FD7
oklch(55.6% 0.174 258.7)
-
Step 700
700
#1B5CBA
oklch(49% 0.162 258.6)
-
Step 800
800
#194C97
oklch(42.8% 0.134 258.6)
-
Step 900
900 (this color)
#12376E
oklch(34.4% 0.104 258.6)
-
Step 950
950
#112646
oklch(27% 0.066 258.6)
#12376E 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) | #183D70 | 0.020 |
| Deuteranopia (no green cones) | #00346D | 0.016 |
| Tritanopia (no blue cones) | #00444D | 0.080 |
| Achromatopsia (no color) | #383838 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12376E
#12376E
oklch(34.4% 0.104 258.6)
- #4D3400
#4D3400
oklch(34.5% 0.072 79)
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 #12376E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.013
- Marine #042E60 ΔE 0.038
- Twilight Blue #0A437A ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.063
- Midnight Green #073B4C ΔE 0.065
- Dark Grey Blue #29465B ΔE 0.069
- Cobalt #1E488F ΔE 0.073
Use #12376E 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.