#1C4B6C
Closest named color: Dark Grey Blue (#29465B). oklch(39.7% 0.075 242.7), rgb(28, 75, 108).
Aa
White text reads best on this color (9.24:1).
About this color
#1C4B6C is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.075 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.030 away. White text reads best on it, at 9.24:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.27:1 |
| White text | 9.24:1 |
Values
| HEX | #1C4B6C |
| RGB | rgb(28, 75, 108) |
| HSL | hsl(205, 59%, 27%) |
| OKLCH | oklch(39.7% 0.075 242.7) |
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 #1C4B6C | 9.24:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #1C4B6C | 2.27:1 | Fails | Lc 12.9 | Not readable |
| #1C4B6C text on white | 9.24:1 | AAA | Lc 91.1 | Preferred for body text |
| #1C4B6C text on black | 2.27:1 | Fails | Lc -11.3 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCED
oklch(88.5% 0.032 243.7)
-
Step 300
300
#A2C6E3
oklch(81% 0.056 242.7)
-
Step 400
400
#6DA7D5
oklch(70.6% 0.091 243.5)
-
Step 500
500
#4191C9
oklch(63.2% 0.115 242.3)
-
Step 600
600
#187AB6
oklch(55.6% 0.125 242.6)
-
Step 700
700
#04669D
oklch(49% 0.117 243)
-
Step 800
800
#0D547F
oklch(42.8% 0.096 242.4)
-
Step 900
900 (this color)
#1C4B6C
oklch(39.7% 0.075 242.7)
-
Step 950
950
#0F293C
oklch(27.1% 0.048 243)
#1C4B6C 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) | #3C4C6D | 0.036 |
| Deuteranopia (no green cones) | #31446B | 0.028 |
| Tritanopia (no blue cones) | #005357 | 0.052 |
| Achromatopsia (no color) | #474747 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C4B6C
#1C4B6C
oklch(39.7% 0.075 242.7)
- #633D16
#633D16
oklch(39.7% 0.075 63)
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 #1C4B6C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.030
- Twilight Blue #0A437A ΔE 0.040
- Light Navy #155084 ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.041
- Charcoal #264653 ΔE 0.042
- Deep Teal #00555A ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.057
- Dark Teal #014D4E ΔE 0.058
Use #1C4B6C 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.