#284263
Closest named color: Dark Grey Blue (#29465B). oklch(37.4% 0.065 255), rgb(40, 66, 99).
Aa
White text reads best on this color (10.24:1).
About this color
#284263 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.065 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.022 away. White text reads best on it, at 10.24:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.04:1 |
| White text | 10.24:1 |
Values
| HEX | #284263 |
| RGB | rgb(40, 66, 99) |
| HSL | hsl(214, 42%, 27%) |
| OKLCH | oklch(37.4% 0.065 255) |
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 #284263 | 10.24:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #284263 | 2.04:1 | Fails | Lc 10.3 | Not readable |
| #284263 text on white | 10.24:1 | AAA | Lc 93.7 | Preferred for body text |
| #284263 text on black | 2.04:1 | Fails | Lc -8.9 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EBF3
oklch(93.7% 0.013 251.6)
-
Step 200
200
#CDDAEB
oklch(88.4% 0.027 255.1)
-
Step 300
300
#ACC3E1
oklch(81% 0.049 255.1)
-
Step 400
400
#7FA3D1
oklch(70.6% 0.079 254.8)
-
Step 500
500
#5F8CC5
oklch(63.2% 0.1 254.9)
-
Step 600
600
#4475B2
oklch(55.6% 0.109 254.8)
-
Step 700
700
#366299
oklch(49.1% 0.101 255)
-
Step 800
800
#2D507C
oklch(42.7% 0.084 255)
-
Step 900
900 (this color)
#284263
oklch(37.4% 0.065 255)
-
Step 950
950
#18273A
oklch(26.9% 0.041 254.8)
#284263 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) | #354464 | 0.019 |
| Deuteranopia (no green cones) | #2D3E62 | 0.013 |
| Tritanopia (no blue cones) | #01494E | 0.057 |
| Achromatopsia (no color) | #414141 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284263
#284263
oklch(37.4% 0.065 255)
- #553B13
#553B13
oklch(37.4% 0.066 74.6)
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 #284263, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.022
- Charcoal #264653 ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.043
- Twilight Blue #0A437A ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.047
- Marine Blue #01386A ΔE 0.050
- Midnight Green #073B4C ΔE 0.055
- Onyx #343A40 ΔE 0.060
Use #284263 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.