#284C69
Closest named color: Dark Grey Blue (#29465B). oklch(40.3% 0.064 244.7), rgb(40, 76, 105).
Aa
White text reads best on this color (9.02:1).
About this color
#284C69 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.064 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.027 away. White text reads best on it, at 9.02:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.32:1 |
| White text | 9.02:1 |
Values
| HEX | #284C69 |
| RGB | rgb(40, 76, 105) |
| HSL | hsl(207, 45%, 28%) |
| OKLCH | oklch(40.3% 0.064 244.7) |
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 #284C69 | 9.02:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #284C69 | 2.32:1 | Fails | Lc 13.4 | Not readable |
| #284C69 text on white | 9.02:1 | AAA | Lc 90.6 | Preferred for body text |
| #284C69 text on black | 2.32:1 | Fails | Lc -11.7 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE6
oklch(88.5% 0.021 243.4)
-
Step 300
300
#ADC4D8
oklch(80.9% 0.038 244.5)
-
Step 400
400
#81A5C4
oklch(70.6% 0.06 244.8)
-
Step 500
500
#618FB5
oklch(63.2% 0.076 244.3)
-
Step 600
600
#4678A1
oklch(55.5% 0.084 244.9)
-
Step 700
700
#38658A
oklch(49.1% 0.078 245.1)
-
Step 800
800 (this color)
#284C69
oklch(40.3% 0.064 244.7)
-
Step 900
900
#2A445B
oklch(37.6% 0.051 246.3)
-
Step 950
950
#192835
oklch(27% 0.032 245.5)
#284C69 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) | #3F4D6A | 0.029 |
| Deuteranopia (no green cones) | #374668 | 0.024 |
| Tritanopia (no blue cones) | #005356 | 0.052 |
| Achromatopsia (no color) | #494949 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284C69
#284C69
oklch(40.3% 0.064 244.7)
- #614120
#614120
oklch(40.4% 0.065 64.9)
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 #284C69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.027
- Charcoal #264653 ΔE 0.039
- Light Navy #155084 ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.049
- Deep Teal #00555A ΔE 0.050
- Twilight Blue #0A437A ΔE 0.051
- Dark Teal #014D4E ΔE 0.057
Use #284C69 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.