#284F6E
Closest named color: Deep Sea Blue (#015482). oklch(41.4% 0.068 244.5), rgb(40, 79, 110).
Aa
White text reads best on this color (8.62:1).
About this color
#284F6E is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.068 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.037 away. White text reads best on it, at 8.62:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.43:1 |
| White text | 8.62:1 |
Values
| HEX | #284F6E |
| RGB | rgb(40, 79, 110) |
| HSL | hsl(207, 47%, 29%) |
| OKLCH | oklch(41.4% 0.068 244.5) |
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 #284F6E | 8.62:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #284F6E | 2.43:1 | Fails | Lc 14.5 | Not readable |
| #284F6E text on white | 8.62:1 | AAA | Lc 89.5 | Fine for body text |
| #284F6E text on black | 2.43:1 | Fails | Lc -12.8 | 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 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
#CDDBE7
oklch(88.4% 0.022 243.8)
-
Step 300
300
#ACC4D9
oklch(80.9% 0.04 244.7)
-
Step 400
400
#7FA5C6
oklch(70.6% 0.064 245.1)
-
Step 500
500
#5D8FB8
oklch(63.1% 0.082 244.4)
-
Step 600
600
#4279A4
oklch(55.7% 0.089 244)
-
Step 700
700
#34658C
oklch(49% 0.082 244.7)
-
Step 800
800 (this color)
#284F6E
oklch(41.4% 0.068 244.5)
-
Step 900
900
#28455C
oklch(37.8% 0.053 243.8)
-
Step 950
950
#182836
oklch(27% 0.034 245.9)
#284F6E 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) | #41506F | 0.031 |
| Deuteranopia (no green cones) | #38496D | 0.024 |
| Tritanopia (no blue cones) | #00565A | 0.052 |
| Achromatopsia (no color) | #4C4C4C | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284F6E
#284F6E
oklch(41.4% 0.068 244.5)
- #654320
#654320
oklch(41.4% 0.068 64.7)
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 #284F6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.038
- Light Navy #155084 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.049
- Charcoal #264653 ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.051
- Deep Teal #00555A ΔE 0.051
- Dusk Blue #26538D ΔE 0.051
Use #284F6E 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.