#28384E
Closest named color: Dark Blue Grey (#1F3B4D). oklch(33.7% 0.044 256.5), rgb(40, 56, 78).
Aa
White text reads best on this color (11.89:1).
About this color
#28384E is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.044 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.015 away. White text reads best on it, at 11.89:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.76:1 |
| White text | 11.89:1 |
Values
| HEX | #28384E |
| RGB | rgb(40, 56, 78) |
| HSL | hsl(215, 32%, 23%) |
| OKLCH | oklch(33.7% 0.044 256.5) |
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 #28384E | 11.89:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #28384E | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #28384E text on white | 11.89:1 | AAA | Lc 97.2 | Preferred for body text |
| #28384E text on black | 1.76:1 | 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
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D1DAE6
oklch(88.5% 0.019 255.5)
-
Step 300
300
#B3C2D6
oklch(80.9% 0.033 255.6)
-
Step 400
400
#8BA2C2
oklch(70.6% 0.054 256.7)
-
Step 500
500
#6F8BB3
oklch(63.1% 0.069 257.3)
-
Step 600
600
#57759E
oklch(55.6% 0.073 256.4)
-
Step 700
700
#476288
oklch(49.1% 0.069 257)
-
Step 800
800
#3A506E
oklch(42.6% 0.057 256.3)
-
Step 900
900 (this color)
#28384E
oklch(33.7% 0.044 256.5)
-
Step 950
950
#1D2734
oklch(26.9% 0.028 255.2)
#28384E 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) | #30394F | 0.013 |
| Deuteranopia (no green cones) | #2B354E | 0.010 |
| Tritanopia (no blue cones) | #193D40 | 0.039 |
| Achromatopsia (no color) | #373737 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28384E
#28384E
oklch(33.7% 0.044 256.5)
- #44341C
#44341C
oklch(33.7% 0.044 76.5)
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 #28384E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.015
- Prussian Blue #1D3557 ΔE 0.025
- Gunmetal #293241 ΔE 0.026
- Midnight Green #073B4C ΔE 0.032
- Onyx #343A40 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.037
- Charcoal #264653 ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.046
Use #28384E 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.