#284D69
Closest named color: Dark Grey Blue (#29465B). oklch(40.6% 0.064 243.1), rgb(40, 77, 105).
Aa
White text reads best on this color (8.91:1).
About this color
#284D69 is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.064 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.028 away. White text reads best on it, at 8.91:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.35:1 |
| White text | 8.91:1 |
Values
| HEX | #284D69 |
| RGB | rgb(40, 77, 105) |
| HSL | hsl(206, 45%, 28%) |
| OKLCH | oklch(40.6% 0.064 243.1) |
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 #284D69 | 8.91:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #284D69 | 2.35:1 | Fails | Lc 13.7 | Not readable |
| #284D69 text on white | 8.91:1 | AAA | Lc 90.3 | Preferred for body text |
| #284D69 text on black | 2.35:1 | Fails | Lc -12.0 | 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
#ADC4D7
oklch(80.9% 0.037 243.1)
-
Step 400
400
#81A5C3
oklch(70.6% 0.059 243.9)
-
Step 500
500
#608FB4
oklch(63.1% 0.076 243.1)
-
Step 600
600
#4579A0
oklch(55.6% 0.083 242.6)
-
Step 700
700
#376589
oklch(49% 0.077 243.9)
-
Step 800
800 (this color)
#284D69
oklch(40.6% 0.064 243.1)
-
Step 900
900
#29455A
oklch(37.8% 0.05 242.1)
-
Step 950
950
#192835
oklch(27% 0.032 245.5)
#284D69 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) | #414D6A | 0.031 |
| Deuteranopia (no green cones) | #384768 | 0.025 |
| Tritanopia (no blue cones) | #005457 | 0.050 |
| Achromatopsia (no color) | #4A4A4A | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284D69
#284D69
oklch(40.6% 0.064 243.1)
- #624122
#624122
oklch(40.6% 0.064 62.5)
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 #284D69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.028
- Charcoal #264653 ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.044
- Light Navy #155084 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.047
- Deep Teal #00555A ΔE 0.048
- Twilight Blue #0A437A ΔE 0.053
- YInMn Blue #415A77 ΔE 0.055
Use #284D69 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.