#2D3F5A
Closest named color: Dark Grey Blue (#29465B). oklch(36.5% 0.052 258.3), rgb(45, 63, 90).
Aa
White text reads best on this color (10.65:1).
About this color
#2D3F5A is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.052 and its hue 258°. 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 10.65:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.97:1 |
| White text | 10.65:1 |
Values
| HEX | #2D3F5A |
| RGB | rgb(45, 63, 90) |
| HSL | hsl(216, 33%, 26%) |
| OKLCH | oklch(36.5% 0.052 258.3) |
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 #2D3F5A | 10.65:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #2D3F5A | 1.97:1 | Fails | Lc 9.3 | Not readable |
| #2D3F5A text on white | 10.65:1 | AAA | Lc 94.7 | Preferred for body text |
| #2D3F5A text on black | 1.97:1 | Fails | Lc -7.9 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE8
oklch(88.5% 0.022 256.7)
-
Step 300
300
#B1C2DB
oklch(80.9% 0.04 257.9)
-
Step 400
400
#89A2C8
oklch(70.7% 0.063 258.6)
-
Step 500
500
#6B8BBA
oklch(63.1% 0.08 257.9)
-
Step 600
600
#5374A6
oklch(55.5% 0.087 258.5)
-
Step 700
700
#43618F
oklch(49% 0.082 258.7)
-
Step 800
800
#385074
oklch(42.8% 0.067 258.3)
-
Step 900
900 (this color)
#2D3F5A
oklch(36.5% 0.052 258.3)
-
Step 950
950
#1C2737
oklch(27% 0.034 257.7)
#2D3F5A 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) | #35415B | 0.014 |
| Deuteranopia (no green cones) | #303C59 | 0.010 |
| Tritanopia (no blue cones) | #1B4548 | 0.047 |
| Achromatopsia (no color) | #3E3E3E | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3F5A
#2D3F5A
oklch(36.5% 0.052 258.3)
- #4D3B1C
#4D3B1C
oklch(36.5% 0.053 79.5)
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 #2D3F5A, 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 0.030
- Dark Blue Grey #1F3B4D ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.040
- Onyx #343A40 ΔE 0.044
- Midnight Green #073B4C ΔE 0.048
- Charcoal Grey #3C4142 ΔE 0.048
- Gunmetal #293241 ΔE 0.055
Use #2D3F5A 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.