#284458
Closest named color: Dark Grey Blue (#29465B). oklch(37.4% 0.048 240.8), rgb(40, 68, 88).
Aa
White text reads best on this color (10.20:1).
About this color
#284458 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.048 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.008 away. White text reads best on it, at 10.20:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.05:1 |
| White text | 10.20:1 |
Values
| HEX | #284458 |
| RGB | rgb(40, 68, 88) |
| HSL | hsl(205, 38%, 25%) |
| OKLCH | oklch(37.4% 0.048 240.8) |
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 #284458 | 10.20:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #284458 | 2.05:1 | Fails | Lc 10.3 | Not readable |
| #284458 text on white | 10.20:1 | AAA | Lc 93.6 | Preferred for body text |
| #284458 text on black | 2.05:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE5
oklch(88.5% 0.02 240.8)
-
Step 300
300
#ADC4D6
oklch(80.9% 0.036 241.6)
-
Step 400
400
#80A6C2
oklch(70.7% 0.058 240.6)
-
Step 500
500
#5F90B2
oklch(63.2% 0.074 239.7)
-
Step 600
600
#45799E
oklch(55.5% 0.08 241.2)
-
Step 700
700
#366687
oklch(49.1% 0.075 240.6)
-
Step 800
800
#2D536E
oklch(42.6% 0.063 241.2)
-
Step 900
900 (this color)
#284458
oklch(37.4% 0.048 240.8)
-
Step 950
950
#182834
oklch(26.8% 0.031 241.7)
#284458 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) | #3B4459 | 0.026 |
| Deuteranopia (no green cones) | #353F58 | 0.022 |
| Tritanopia (no blue cones) | #0F494B | 0.039 |
| Achromatopsia (no color) | #414141 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284458
#284458
oklch(37.4% 0.048 240.8)
- #543B25
#543B25
oklch(37.5% 0.049 61.8)
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 #284458, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.008
- Charcoal #264653 ΔE 0.013
- Dark Blue Grey #1F3B4D ΔE 0.035
- Charcoal Grey #3C4142 ΔE 0.043
- Onyx #343A40 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.045
- Dark Teal #014D4E ΔE 0.046
- Midnight Green #073B4C ΔE 0.048
Use #284458 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.