#18455B
Closest named color: Dark Grey Blue (#29465B). oklch(37% 0.061 233.2), rgb(24, 69, 91).
Aa
White text reads best on this color (10.28:1).
About this color
#18455B is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.061 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.017 away. White text reads best on it, at 10.28:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.04:1 |
| White text | 10.28:1 |
Values
| HEX | #18455B |
| RGB | rgb(24, 69, 91) |
| HSL | hsl(200, 58%, 23%) |
| OKLCH | oklch(37% 0.061 233.2) |
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 #18455B | 10.28:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #18455B | 2.04:1 | Fails | Lc 10.3 | Not readable |
| #18455B text on white | 10.28:1 | AAA | Lc 93.7 | Preferred for body text |
| #18455B text on black | 2.04:1 | Fails | Lc -8.9 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#C9DCE8
oklch(88.4% 0.026 235.4)
-
Step 300
300
#A4C6DA
oklch(80.8% 0.046 233.9)
-
Step 400
400
#71A9C7
oklch(70.7% 0.073 232.6)
-
Step 500
500
#4893B9
oklch(63.1% 0.094 233)
-
Step 600
600
#237DA5
oklch(55.7% 0.102 232.6)
-
Step 700
700
#13698E
oklch(49.1% 0.095 233.2)
-
Step 800
800
#155673
oklch(42.8% 0.079 232.7)
-
Step 900
900 (this color)
#18455B
oklch(37% 0.061 233.2)
-
Step 950
950
#112A36
oklch(27.1% 0.038 231.3)
#18455B 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) | #3A445C | 0.039 |
| Deuteranopia (no green cones) | #313E5B | 0.033 |
| Tritanopia (no blue cones) | #004B4C | 0.040 |
| Achromatopsia (no color) | #404040 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18455B
#18455B
oklch(37% 0.061 233.2)
- #59361F
#59361F
oklch(37% 0.061 53)
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 #18455B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.017
- Charcoal #264653 ΔE 0.019
- Dark Blue Grey #1F3B4D ΔE 0.035
- Dark Teal #014D4E ΔE 0.041
- Midnight Green #073B4C ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.051
- Dark Slate Gray #2F4F4F ΔE 0.051
- Deep Teal #00555A ΔE 0.053
Use #18455B 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.