#123180
Closest named color: Marine Blue (#01386A). oklch(34.6% 0.139 264.1), rgb(18, 49, 128).
Aa
White text reads best on this color (11.81:1).
About this color
#123180 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.139 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.045 away. White text reads best on it, at 11.81:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.77:1 |
| White text | 11.81:1 |
Values
| HEX | #123180 |
| RGB | rgb(18, 49, 128) |
| HSL | hsl(223, 75%, 29%) |
| OKLCH | oklch(34.6% 0.139 264.1) |
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 #123180 | 11.81:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #123180 | 1.77:1 | Fails | Lc 7.4 | Not readable |
| #123180 text on white | 11.81:1 | AAA | Lc 96.5 | Preferred for body text |
| #123180 text on black | 1.77:1 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7DAFF
oklch(88.6% 0.055 263.7)
-
Step 300
300
#A1C0FF
oklch(80.8% 0.096 264.1)
-
Step 400
400
#6F9DFF
oklch(70.7% 0.152 263.9)
-
Step 500
500
#4A80FF
oklch(63.1% 0.198 264.2)
-
Step 600
600
#2962F7
oklch(55.5% 0.231 264.1)
-
Step 700
700
#1D50D8
oklch(49.2% 0.215 264.1)
-
Step 800
800
#1943AE
oklch(42.8% 0.177 264)
-
Step 900
900 (this color)
#123180
oklch(34.6% 0.139 264.1)
-
Step 950
950
#0F2351
oklch(27.1% 0.088 263.8)
#123180 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) | #003D83 | 0.032 |
| Deuteranopia (no green cones) | #00337E | 0.011 |
| Tritanopia (no blue cones) | #004553 | 0.107 |
| Achromatopsia (no color) | #373737 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #123180
#123180
oklch(34.6% 0.139 264.1)
- #4B3600
#4B3600
oklch(34.7% 0.071 84.3)
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 #123180, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.045
- Twilight Blue #0A437A ΔE 0.052
- Marine #042E60 ΔE 0.058
- Royal #0C1793 ΔE 0.059
- Midnight Blue #191970 ΔE 0.062
- Cobalt #1E488F ΔE 0.069
- Prussian Blue #1D3557 ΔE 0.074
- Sapphire #2138AB ΔE 0.077
Use #123180 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.