#12448C
Closest named color: Cobalt (#1E488F). oklch(39.9% 0.131 258.5), rgb(18, 68, 140).
Aa
White text reads best on this color (9.41:1).
About this color
#12448C is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.131 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.016 away. White text reads best on it, at 9.41:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.23:1 |
| White text | 9.41:1 |
Values
| HEX | #12448C |
| RGB | rgb(18, 68, 140) |
| HSL | hsl(215, 77%, 31%) |
| OKLCH | oklch(39.9% 0.131 258.5) |
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 #12448C | 9.41:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #12448C | 2.23:1 | Fails | Lc 12.7 | Not readable |
| #12448C text on white | 9.41:1 | AAA | Lc 91.2 | Preferred for body text |
| #12448C text on black | 2.23:1 | Fails | Lc -11.1 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C4DBFE
oklch(88.6% 0.054 258.7)
-
Step 300
300
#9BC2FF
oklch(80.8% 0.097 259.2)
-
Step 400
400
#62A0FF
oklch(70.7% 0.154 258.7)
-
Step 500
500
#3084FF
oklch(63% 0.2 258.6)
-
Step 600
600
#006BEB
oklch(55.7% 0.21 258.5)
-
Step 700
700
#0059C7
oklch(49% 0.186 258.6)
-
Step 800
800
#0049A5
oklch(42.7% 0.162 258.5)
-
Step 900
900 (this color)
#12448C
oklch(39.9% 0.131 258.5)
-
Step 950
950
#09254E
oklch(27.1% 0.083 258.4)
#12448C 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) | #164C8F | 0.024 |
| Deuteranopia (no green cones) | #00418B | 0.013 |
| Tritanopia (no blue cones) | #005661 | 0.101 |
| Achromatopsia (no color) | #464646 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12448C
#12448C
oklch(39.9% 0.131 258.5)
- #5F4100
#5F4100
oklch(39.9% 0.083 79)
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 #12448C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.016
- Twilight Blue #0A437A ΔE 0.031
- Light Navy #155084 ΔE 0.040
- Dusk Blue #26538D ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.052
- Sapphire #2138AB ΔE 0.060
- Blueberry #464196 ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.063
Use #12448C 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.