#1B445E
Closest named color: Dark Grey Blue (#29465B). oklch(37% 0.064 239.6), rgb(27, 68, 94).
Aa
White text reads best on this color (10.31:1).
About this color
#1B445E is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.064 and its hue 240°. 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 10.31:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.03:1 |
| White text | 10.31:1 |
Values
| HEX | #1B445E |
| RGB | rgb(27, 68, 94) |
| HSL | hsl(203, 55%, 24%) |
| OKLCH | oklch(37% 0.064 239.6) |
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 #1B445E | 10.31:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #1B445E | 2.03:1 | Fails | Lc 10.2 | Not readable |
| #1B445E text on white | 10.31:1 | AAA | Lc 93.8 | Preferred for body text |
| #1B445E text on black | 2.03:1 | Fails | Lc -8.8 | 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
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CADCE9
oklch(88.5% 0.026 239.1)
-
Step 300
300
#A5C6DD
oklch(81% 0.048 238.6)
-
Step 400
400
#73A7CC
oklch(70.6% 0.077 240.2)
-
Step 500
500
#4C91BF
oklch(63.1% 0.099 240)
-
Step 600
600
#2B7BAB
oklch(55.7% 0.106 239.5)
-
Step 700
700
#1C6793
oklch(49.1% 0.1 239.9)
-
Step 800
800
#1B5477
oklch(42.6% 0.082 240)
-
Step 900
900 (this color)
#1B445E
oklch(37% 0.064 239.6)
-
Step 950
950
#122938
oklch(27% 0.04 239.2)
#1B445E 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) | #38445F | 0.034 |
| Deuteranopia (no green cones) | #2F3D5E | 0.029 |
| Tritanopia (no blue cones) | #004B4D | 0.046 |
| Achromatopsia (no color) | #404040 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B445E
#1B445E
oklch(37% 0.064 239.6)
- #58371A
#58371A
oklch(37% 0.064 60.1)
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 #1B445E, 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 0.024
- Dark Blue Grey #1F3B4D ΔE 0.036
- Midnight Green #073B4C ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.047
- Dark Teal #014D4E ΔE 0.049
- Twilight Blue #0A437A ΔE 0.050
- Marine Blue #01386A ΔE 0.052
Use #1B445E 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.