#123166
Closest named color: Marine (#042E60). oklch(32.3% 0.1 260.4), rgb(18, 49, 102).
Aa
White text reads best on this color (12.67:1).
About this color
#123166 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.100 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.018 away. White text reads best on it, at 12.67:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.65:1 |
| White text | 12.67:1 |
Values
| HEX | #123166 |
| RGB | rgb(18, 49, 102) |
| HSL | hsl(218, 70%, 24%) |
| OKLCH | oklch(32.3% 0.1 260.4) |
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 #123166 | 12.67:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #123166 | 1.65:1 | Fails | Lc 0.0 | Not readable |
| #123166 text on white | 12.67:1 | AAA | Lc 98.3 | Preferred for body text |
| #123166 text on black | 1.65:1 | 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 950.
-
Step 50
50
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFF
oklch(93.6% 0.031 258.9)
-
Step 200
200
#C4DAFF
oklch(88.4% 0.057 260.8)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#679FFF
oklch(70.7% 0.153 260.6)
-
Step 500
500
#3A83FF
oklch(63.1% 0.199 260.3)
-
Step 600
600
#0066F7
oklch(55.7% 0.231 260.3)
-
Step 700
700
#0055D2
oklch(49.1% 0.205 260.4)
-
Step 800
800
#0045AE
oklch(42.7% 0.178 260.4)
-
Step 900
900
#003993
oklch(37.7% 0.158 260.5)
-
Step 950
950 (this color)
#123166
oklch(32.3% 0.1 260.4)
#123166 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) | #123768 | 0.018 |
| Deuteranopia (no green cones) | #002F65 | 0.015 |
| Tritanopia (no blue cones) | #003E46 | 0.079 |
| Achromatopsia (no color) | #333333 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #123166
#123166
oklch(32.3% 0.1 260.4)
- #452F00
#452F00
oklch(32.3% 0.067 80.4)
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 #123166, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.018
- Marine Blue #01386A ΔE 0.021
- Prussian Blue #1D3557 ΔE 0.033
- Twilight Blue #0A437A ΔE 0.060
- Midnight Blue #191970 ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.062
- Midnight Green #073B4C ΔE 0.062
- Space Cadet #2B2D42 ΔE 0.068
Use #123166 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.