#18457F
Closest named color: Twilight Blue (#0A437A). oklch(39.3% 0.11 256.4), rgb(24, 69, 127).
Aa
White text reads best on this color (9.56:1).
About this color
#18457F is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.110 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.014 away. White text reads best on it, at 9.56:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.19:1 |
| White text | 9.56:1 |
Values
| HEX | #18457F |
| RGB | rgb(24, 69, 127) |
| HSL | hsl(214, 68%, 30%) |
| OKLCH | oklch(39.3% 0.11 256.4) |
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 #18457F | 9.56:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #18457F | 2.19:1 | Fails | Lc 12.2 | Not readable |
| #18457F text on white | 9.56:1 | AAA | Lc 91.8 | Preferred for body text |
| #18457F text on black | 2.19:1 | Fails | Lc -10.6 | 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
#9EC3F6
oklch(80.9% 0.083 256.5)
-
Step 400
400
#68A2F1
oklch(70.6% 0.132 256.5)
-
Step 500
500
#3C89EC
oklch(63.2% 0.167 256.1)
-
Step 600
600
#1370DB
oklch(55.7% 0.183 256.3)
-
Step 700
700
#015DBE
oklch(49.2% 0.17 256.4)
-
Step 800
800
#094C9A
oklch(42.7% 0.142 256.6)
-
Step 900
900 (this color)
#18457F
oklch(39.3% 0.11 256.4)
-
Step 950
950
#0D2647
oklch(26.9% 0.069 256.4)
#18457F 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) | #274A81 | 0.022 |
| Deuteranopia (no green cones) | #12417E | 0.013 |
| Tritanopia (no blue cones) | #00535B | 0.085 |
| Achromatopsia (no color) | #454545 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18457F
#18457F
oklch(39.3% 0.11 256.4)
- #5F3F00
#5F3F00
oklch(39.4% 0.083 76.4)
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 #18457F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.014
- Cobalt #1E488F ΔE 0.028
- Light Navy #155084 ΔE 0.032
- Deep Sea Blue #015482 ΔE 0.044
- Dusk Blue #26538D ΔE 0.048
- Marine Blue #01386A ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.065
Use #18457F 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.