#284170
Closest named color: Twilight Blue (#0A437A). oklch(38% 0.086 262), rgb(40, 65, 112).
Aa
White text reads best on this color (10.09:1).
About this color
#284170 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.086 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.027 away. White text reads best on it, at 10.09:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.08:1 |
| White text | 10.09:1 |
Values
| HEX | #284170 |
| RGB | rgb(40, 65, 112) |
| HSL | hsl(219, 47%, 30%) |
| OKLCH | oklch(38% 0.086 262) |
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 #284170 | 10.09:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #284170 | 2.08:1 | Fails | Lc 10.7 | Not readable |
| #284170 text on white | 10.09:1 | AAA | Lc 93.3 | Preferred for body text |
| #284170 text on black | 2.08:1 | Fails | Lc -9.2 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF2
oklch(88.5% 0.036 261.3)
-
Step 300
300
#AAC1EB
oklch(80.8% 0.065 262.4)
-
Step 400
400
#7DA1E2
oklch(70.8% 0.104 261.8)
-
Step 500
500
#5C88D9
oklch(63.2% 0.132 261.7)
-
Step 600
600
#4270C7
oklch(55.7% 0.144 261.9)
-
Step 700
700
#345DAC
oklch(49.1% 0.135 262)
-
Step 800
800
#2C4C8B
oklch(42.6% 0.111 262.4)
-
Step 900
900 (this color)
#284170
oklch(38% 0.086 262)
-
Step 950
950
#172641
oklch(27% 0.055 261.4)
#284170 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) | #2C4572 | 0.014 |
| Deuteranopia (no green cones) | #223F6F | 0.010 |
| Tritanopia (no blue cones) | #004C53 | 0.074 |
| Achromatopsia (no color) | #424242 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284170
#284170
oklch(38% 0.086 262)
- #573D00
#573D00
oklch(37.9% 0.078 81.4)
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 #284170, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.027
- Dark Grey Blue #29465B ΔE 0.043
- Marine Blue #01386A ΔE 0.046
- Light Navy #155084 ΔE 0.050
- Cobalt #1E488F ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.056
- Charcoal #264653 ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.059
Use #284170 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.