#12406B
Closest named color: Twilight Blue (#0A437A). oklch(36.5% 0.089 250.6), rgb(18, 64, 107).
Aa
White text reads best on this color (10.65:1).
About this color
#12406B is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.089 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.026 away. White text reads best on it, at 10.65:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.97:1 |
| White text | 10.65:1 |
Values
| HEX | #12406B |
| RGB | rgb(18, 64, 107) |
| HSL | hsl(209, 71%, 25%) |
| OKLCH | oklch(36.5% 0.089 250.6) |
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 #12406B | 10.65:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #12406B | 1.97:1 | Fails | Lc 9.6 | Not readable |
| #12406B text on white | 10.65:1 | AAA | Lc 94.4 | Preferred for body text |
| #12406B text on black | 1.97:1 | Fails | Lc -8.2 | 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
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DCF1
oklch(88.6% 0.036 249.5)
-
Step 300
300
#A1C4EB
oklch(80.8% 0.067 251.4)
-
Step 400
400
#6CA5E1
oklch(70.7% 0.107 250.7)
-
Step 500
500
#418DD8
oklch(63% 0.136 250.6)
-
Step 600
600
#1976C6
oklch(55.7% 0.148 250.4)
-
Step 700
700
#0762AB
oklch(49% 0.138 250.8)
-
Step 800
800
#0E518A
oklch(42.8% 0.113 250.2)
-
Step 900
900 (this color)
#12406B
oklch(36.5% 0.089 250.6)
-
Step 950
950
#0F2841
oklch(27.1% 0.056 250.6)
#12406B 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) | #2C436D | 0.029 |
| Deuteranopia (no green cones) | #1E3B6A | 0.016 |
| Tritanopia (no blue cones) | #004A50 | 0.065 |
| Achromatopsia (no color) | #3E3E3E | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12406B
#12406B
oklch(36.5% 0.089 250.6)
- #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 #12406B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.026
- Marine Blue #01386A ΔE 0.028
- Dark Grey Blue #29465B ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.052
- Charcoal #264653 ΔE 0.053
- Midnight Green #073B4C ΔE 0.056
- Marine #042E60 ΔE 0.059
Use #12406B 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.