#12417A
Closest named color: Twilight Blue (#0A437A). oklch(37.8% 0.109 255.8), rgb(18, 65, 122).
Aa
White text reads best on this color (10.18:1).
About this color
#12417A is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.109 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.006 away. White text reads best on it, at 10.18:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.06:1 |
| White text | 10.18:1 |
Values
| HEX | #12417A |
| RGB | rgb(18, 65, 122) |
| HSL | hsl(213, 74%, 27%) |
| OKLCH | oklch(37.8% 0.109 255.8) |
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 #12417A | 10.18:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #12417A | 2.06:1 | Fails | Lc 10.7 | Not readable |
| #12417A text on white | 10.18:1 | AAA | Lc 93.2 | Preferred for body text |
| #12417A text on black | 2.06:1 | Fails | Lc -9.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF8
oklch(88.5% 0.046 256.5)
-
Step 300
300
#9EC3F5
oklch(80.8% 0.082 256.1)
-
Step 400
400
#67A3F1
oklch(70.8% 0.131 255.5)
-
Step 500
500
#3A89EC
oklch(63.1% 0.168 255.8)
-
Step 600
600
#0E70DA
oklch(55.5% 0.182 255.8)
-
Step 700
700
#005EBC
oklch(49.2% 0.166 255.7)
-
Step 800
800
#064D99
oklch(42.8% 0.14 255.7)
-
Step 900
900 (this color)
#12417A
oklch(37.8% 0.109 255.8)
-
Step 950
950
#0C2647
oklch(26.9% 0.069 255.8)
#12417A 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) | #23467C | 0.022 |
| Deuteranopia (no green cones) | #0B3D79 | 0.013 |
| Tritanopia (no blue cones) | #004F57 | 0.084 |
| Achromatopsia (no color) | #414141 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12417A
#12417A
oklch(37.8% 0.109 255.8)
- #5A3B00
#5A3B00
oklch(37.9% 0.08 75.8)
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 #12417A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.006
- Marine Blue #01386A ΔE 0.040
- Cobalt #1E488F ΔE 0.041
- Light Navy #155084 ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.062
- Dusk Blue #26538D ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.065
Use #12417A 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.