#284758
Closest named color: Dark Grey Blue (#29465B). oklch(38.1% 0.047 233.9), rgb(40, 71, 88).
Aa
White text reads best on this color (9.84:1).
About this color
#284758 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.047 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.007 away. White text reads best on it, at 9.84:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.13:1 |
| White text | 9.84:1 |
Values
| HEX | #284758 |
| RGB | rgb(40, 71, 88) |
| HSL | hsl(201, 38%, 25%) |
| OKLCH | oklch(38.1% 0.047 233.9) |
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 #284758 | 9.84:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #284758 | 2.13:1 | Fails | Lc 11.2 | Not readable |
| #284758 text on white | 9.84:1 | AAA | Lc 92.8 | Preferred for body text |
| #284758 text on black | 2.13:1 | Fails | Lc -9.7 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#ABC5D4
oklch(80.9% 0.035 233.2)
-
Step 400
400
#7EA7BF
oklch(70.7% 0.057 234.3)
-
Step 500
500
#5C91AF
oklch(63.1% 0.072 234.4)
-
Step 600
600
#407B9A
oklch(55.6% 0.078 233.5)
-
Step 700
700
#326784
oklch(49% 0.073 234.9)
-
Step 800
800
#2A546B
oklch(42.6% 0.061 234.6)
-
Step 900
900 (this color)
#284758
oklch(38.1% 0.047 233.9)
-
Step 950
950
#172933
oklch(27% 0.03 233.8)
#284758 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) | #3F4659 | 0.031 |
| Deuteranopia (no green cones) | #384158 | 0.027 |
| Tritanopia (no blue cones) | #0E4C4D | 0.036 |
| Achromatopsia (no color) | #434343 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284758
#284758
oklch(38.1% 0.047 233.9)
- #573C2B
#573C2B
oklch(38.2% 0.047 53)
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 #284758, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.007
- Charcoal #264653 ΔE 0.009
- Dark Slate Gray #2F4F4F ΔE 0.036
- Dark Teal #014D4E ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.043
- Deep Teal #00555A ΔE 0.048
- Onyx #343A40 ΔE 0.050
Use #284758 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.