#123A6D
Closest named color: Marine Blue (#01386A). oklch(35.1% 0.099 256.3), rgb(18, 58, 109).
Aa
White text reads best on this color (11.34:1).
About this color
#123A6D is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.099 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.014 away. White text reads best on it, at 11.34:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.85:1 |
| White text | 11.34:1 |
Values
| HEX | #123A6D |
| RGB | rgb(18, 58, 109) |
| HSL | hsl(214, 72%, 25%) |
| OKLCH | oklch(35.1% 0.099 256.3) |
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 #123A6D | 11.34:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #123A6D | 1.85:1 | Fails | Lc 8.1 | Not readable |
| #123A6D text on white | 11.34:1 | AAA | Lc 95.8 | Preferred for body text |
| #123A6D text on black | 1.85:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C8DBF5
oklch(88.5% 0.041 256.2)
-
Step 300
300
#A2C3F1
oklch(80.9% 0.075 256.7)
-
Step 400
400
#6EA3EA
oklch(70.8% 0.119 256.1)
-
Step 500
500
#468AE3
oklch(63.2% 0.151 256.1)
-
Step 600
600
#2571D1
oklch(55.5% 0.165 256.5)
-
Step 700
700
#165EB5
oklch(49% 0.154 256.4)
-
Step 800
800
#164E93
oklch(42.8% 0.127 256.1)
-
Step 900
900 (this color)
#123A6D
oklch(35.1% 0.099 256.3)
-
Step 950
950
#102744
oklch(27.1% 0.062 255.3)
#123A6D 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) | #203F6F | 0.022 |
| Deuteranopia (no green cones) | #0C366C | 0.014 |
| Tritanopia (no blue cones) | #00464E | 0.075 |
| Achromatopsia (no color) | #3A3A3A | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #123A6D
#123A6D
oklch(35.1% 0.099 256.3)
- #503500
#503500
oklch(35.2% 0.074 77.3)
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 #123A6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.014
- Twilight Blue #0A437A ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.039
- Marine #042E60 ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.060
- Midnight Green #073B4C ΔE 0.061
- Cobalt #1E488F ΔE 0.069
Use #123A6D 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.