#123E68
Closest named color: Marine Blue (#01386A). oklch(35.8% 0.087 250.9), rgb(18, 62, 104).
Aa
White text reads best on this color (10.96:1).
About this color
#123E68 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.087 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.023 away. White text reads best on it, at 10.96:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.91:1 |
| White text | 10.96:1 |
Values
| HEX | #123E68 |
| RGB | rgb(18, 62, 104) |
| HSL | hsl(209, 70%, 24%) |
| OKLCH | oklch(35.8% 0.087 250.9) |
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 #123E68 | 10.96:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #123E68 | 1.91:1 | Fails | Lc 8.8 | Not readable |
| #123E68 text on white | 10.96:1 | AAA | Lc 95.1 | Preferred for body text |
| #123E68 text on black | 1.91:1 | Fails | Lc -7.6 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DBF1
oklch(88.4% 0.037 252.1)
-
Step 300
300
#A2C4EA
oklch(80.9% 0.065 251.5)
-
Step 400
400
#6EA5E0
oklch(70.8% 0.105 251.1)
-
Step 500
500
#448DD7
oklch(63.1% 0.134 251)
-
Step 600
600
#1F76C4
oklch(55.7% 0.144 250.6)
-
Step 700
700
#1062A9
oklch(49% 0.135 251)
-
Step 800
800
#125189
oklch(42.8% 0.111 250.5)
-
Step 900
900 (this color)
#123E68
oklch(35.8% 0.087 250.9)
-
Step 950
950
#0F2840
oklch(27% 0.055 249.7)
#123E68 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) | #2A416A | 0.027 |
| Deuteranopia (no green cones) | #1D3967 | 0.016 |
| Tritanopia (no blue cones) | #00484E | 0.064 |
| Achromatopsia (no color) | #3C3C3C | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #123E68
#123E68
oklch(35.8% 0.087 250.9)
- #553400
#553400
oklch(35.7% 0.077 70.8)
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 #123E68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.023
- Twilight Blue #0A437A ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.045
- Dark Blue Grey #1F3B4D ΔE 0.047
- Midnight Green #073B4C ΔE 0.051
- Marine #042E60 ΔE 0.053
- Charcoal #264653 ΔE 0.054
Use #123E68 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.