#18506C
Closest named color: Deep Sea Blue (#015482). oklch(40.9% 0.074 234.7), rgb(24, 80, 108).
Aa
White text reads best on this color (8.73:1).
About this color
#18506C is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.074 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.036 away. White text reads best on it, at 8.73:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.40:1 |
| White text | 8.73:1 |
Values
| HEX | #18506C |
| RGB | rgb(24, 80, 108) |
| HSL | hsl(200, 64%, 26%) |
| OKLCH | oklch(40.9% 0.074 234.7) |
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 #18506C | 8.73:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #18506C | 2.40:1 | Fails | Lc 14.3 | Not readable |
| #18506C text on white | 8.73:1 | AAA | Lc 89.7 | Fine for body text |
| #18506C text on black | 2.40:1 | Fails | Lc -12.6 | 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 800.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A7C6D9
oklch(81% 0.043 235)
-
Step 400
400
#76A8C6
oklch(70.7% 0.069 235.4)
-
Step 500
500
#4F92B7
oklch(63.1% 0.088 234.7)
-
Step 600
600
#2F7CA3
oklch(55.6% 0.096 234.4)
-
Step 700
700
#21688C
oklch(49.1% 0.089 235.2)
-
Step 800
800 (this color)
#18506C
oklch(40.9% 0.074 234.7)
-
Step 900
900
#1F465C
oklch(37.6% 0.058 235.9)
-
Step 950
950
#132936
oklch(26.9% 0.037 236.3)
#18506C 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) | #424F6D | 0.045 |
| Deuteranopia (no green cones) | #37476C | 0.039 |
| Tritanopia (no blue cones) | #00575A | 0.045 |
| Achromatopsia (no color) | #4B4B4B | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18506C
#18506C
oklch(40.9% 0.074 234.7)
- #683E20
#683E20
oklch(40.8% 0.073 54.5)
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 #18506C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.037
- Light Navy #155084 ΔE 0.041
- Deep Teal #00555A ΔE 0.041
- Charcoal #264653 ΔE 0.046
- Petrol #005F6A ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.051
- Twilight Blue #0A437A ΔE 0.053
Use #18506C 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.