#18448F
Closest named color: Cobalt (#1E488F). oklch(40.3% 0.134 260.4), rgb(24, 68, 143).
Aa
White text reads best on this color (9.28:1).
About this color
#18448F is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.134 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.013 away. White text reads best on it, at 9.28:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.26:1 |
| White text | 9.28:1 |
Values
| HEX | #18448F |
| RGB | rgb(24, 68, 143) |
| HSL | hsl(218, 71%, 33%) |
| OKLCH | oklch(40.3% 0.134 260.4) |
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 #18448F | 9.28:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #18448F | 2.26:1 | Fails | Lc 13.0 | Not readable |
| #18448F text on white | 9.28:1 | AAA | Lc 90.9 | Preferred for body text |
| #18448F text on black | 2.26:1 | Fails | Lc -11.4 | 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 800.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAF9
oklch(93.5% 0.023 260.7)
-
Step 200
200
#C9DAF7
oklch(88.5% 0.044 261.2)
-
Step 300
300
#A4C2F4
oklch(81% 0.078 260.5)
-
Step 400
400
#72A0EE
oklch(70.6% 0.125 260.5)
-
Step 500
500
#4D87E9
oklch(63.2% 0.16 260.2)
-
Step 600
600
#316ED7
oklch(55.6% 0.174 260.5)
-
Step 700
700
#235BBA
oklch(49% 0.161 260.4)
-
Step 800
800 (this color)
#18448F
oklch(40.3% 0.134 260.4)
-
Step 900
900
#1E3F78
oklch(37.6% 0.105 260.5)
-
Step 950
950
#122646
oklch(27.1% 0.065 259.4)
#18448F 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) | #124D92 | 0.025 |
| Deuteranopia (no green cones) | #00428E | 0.014 |
| Tritanopia (no blue cones) | #005663 | 0.102 |
| Achromatopsia (no color) | #474747 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18448F
#18448F
oklch(40.3% 0.134 260.4)
- #604300
#604300
oklch(40.5% 0.084 80.6)
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 #18448F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.013
- Twilight Blue #0A437A ΔE 0.037
- Light Navy #155084 ΔE 0.041
- Dusk Blue #26538D ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.054
- Sapphire #2138AB ΔE 0.055
- Blueberry #464196 ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.059
Use #18448F 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.