#123179
Closest named color: Marine Blue (#01386A). oklch(34% 0.129 263.5), rgb(18, 49, 121).
Aa
White text reads best on this color (12.06:1).
About this color
#123179 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.129 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.035 away. White text reads best on it, at 12.06:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.74:1 |
| White text | 12.06:1 |
Values
| HEX | #123179 |
| RGB | rgb(18, 49, 121) |
| HSL | hsl(222, 74%, 27%) |
| OKLCH | oklch(34% 0.129 263.5) |
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 #123179 | 12.06:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #123179 | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #123179 text on white | 12.06:1 | AAA | Lc 97.0 | Preferred for body text |
| #123179 text on black | 1.74:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFE
oklch(88.6% 0.054 263.2)
-
Step 300
300
#A1C1FF
oklch(81% 0.095 263.3)
-
Step 400
400
#6E9DFF
oklch(70.6% 0.153 263.6)
-
Step 500
500
#4881FF
oklch(63.2% 0.197 263.5)
-
Step 600
600
#2C66EE
oklch(55.6% 0.214 263.5)
-
Step 700
700
#1F53CF
oklch(49% 0.2 263.5)
-
Step 800
800
#1B45A7
oklch(42.6% 0.165 263.4)
-
Step 900
900 (this color)
#123179
oklch(34% 0.129 263.5)
-
Step 950
950
#11244E
oklch(27.1% 0.081 263.6)
#123179 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) | #003B7B | 0.027 |
| Deuteranopia (no green cones) | #003278 | 0.011 |
| Tritanopia (no blue cones) | #004350 | 0.099 |
| Achromatopsia (no color) | #363636 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #123179
#123179
oklch(34% 0.129 263.5)
- #493400
#493400
oklch(34% 0.07 83.6)
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 #123179, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.035
- Marine #042E60 ΔE 0.046
- Twilight Blue #0A437A ΔE 0.051
- Midnight Blue #191970 ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.063
- Royal #0C1793 ΔE 0.067
- Cobalt #1E488F ΔE 0.074
- Dark Blue #00008B ΔE 0.088
Use #123179 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.