#28394A
Closest named color: Dark Blue Grey (#1F3B4D). oklch(33.7% 0.037 249), rgb(40, 57, 74).
Aa
White text reads best on this color (11.83:1).
About this color
#28394A is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.037 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.012 away. White text reads best on it, at 11.83:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.77:1 |
| White text | 11.83:1 |
Values
| HEX | #28394A |
| RGB | rgb(40, 57, 74) |
| HSL | hsl(210, 30%, 22%) |
| OKLCH | oklch(33.7% 0.037 249) |
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 #28394A | 11.83:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #28394A | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #28394A text on white | 11.83:1 | AAA | Lc 97.1 | Preferred for body text |
| #28394A text on black | 1.77:1 | Fails | Lc 0.0 | 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
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D1DAE3
oklch(88.4% 0.016 248)
-
Step 300
300
#B3C3D2
oklch(81% 0.028 246.4)
-
Step 400
400
#8BA3BC
oklch(70.6% 0.046 249.5)
-
Step 500
500
#6F8DAB
oklch(63.2% 0.057 248.7)
-
Step 600
600
#567797
oklch(55.7% 0.063 248.2)
-
Step 700
700
#466481
oklch(49.2% 0.059 248.3)
-
Step 800
800
#3A5168
oklch(42.6% 0.048 249)
-
Step 900
900 (this color)
#28394A
oklch(33.7% 0.037 249)
-
Step 950
950
#1D2832
oklch(27.1% 0.024 246.3)
#28394A 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) | #32394B | 0.015 |
| Deuteranopia (no green cones) | #2E364A | 0.012 |
| Tritanopia (no blue cones) | #1B3D3F | 0.032 |
| Achromatopsia (no color) | #373737 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28394A
#28394A
oklch(33.7% 0.037 249)
- #443422
#443422
oklch(33.8% 0.037 69.3)
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 #28394A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.012
- Gunmetal #293241 ΔE 0.024
- Onyx #343A40 ΔE 0.025
- Midnight Green #073B4C ΔE 0.030
- Prussian Blue #1D3557 ΔE 0.033
- Space Cadet #2B2D42 ΔE 0.038
- Charcoal #264653 ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.046
Use #28394A 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.