#12406D
Closest named color: Twilight Blue (#0A437A). oklch(36.6% 0.092 251.5), rgb(18, 64, 109).
Aa
White text reads best on this color (10.60:1).
About this color
#12406D is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.092 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.022 away. White text reads best on it, at 10.60:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.97:1 |
| White text | 10.60:1 |
Values
| HEX | #12406D |
| RGB | rgb(18, 64, 109) |
| HSL | hsl(210, 72%, 25%) |
| OKLCH | oklch(36.6% 0.092 251.5) |
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 #12406D | 10.60:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #12406D | 1.97:1 | Fails | Lc 9.7 | Not readable |
| #12406D text on white | 10.60:1 | AAA | Lc 94.3 | Preferred for body text |
| #12406D text on black | 1.97:1 | Fails | Lc -8.3 | 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
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C7DBF2
oklch(88.4% 0.038 251.9)
-
Step 300
300
#A0C4EC
oklch(80.8% 0.069 251.4)
-
Step 400
400
#6BA5E3
oklch(70.7% 0.11 251.1)
-
Step 500
500
#408DDB
oklch(63.2% 0.14 251.3)
-
Step 600
600
#1875C9
oklch(55.6% 0.153 251.5)
-
Step 700
700
#0662AE
oklch(49.2% 0.142 251.5)
-
Step 800
800
#0D508D
oklch(42.7% 0.119 251.7)
-
Step 900
900 (this color)
#12406D
oklch(36.6% 0.092 251.5)
-
Step 950
950
#0E2842
oklch(27.1% 0.058 250.8)
#12406D 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) | #2A436F | 0.026 |
| Deuteranopia (no green cones) | #1C3B6C | 0.016 |
| Tritanopia (no blue cones) | #004B51 | 0.068 |
| Achromatopsia (no color) | #3F3F3F | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12406D
#12406D
oklch(36.6% 0.092 251.5)
- #583600
#583600
oklch(36.5% 0.079 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 #12406D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.022
- Marine Blue #01386A ΔE 0.028
- Dark Grey Blue #29465B ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.055
- Charcoal #264653 ΔE 0.056
- Light Navy #155084 ΔE 0.058
- Midnight Green #073B4C ΔE 0.059
Use #12406D 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.