#2A4561
Closest named color: Dark Grey Blue (#29465B). oklch(38.2% 0.058 250.4), rgb(42, 69, 97).
Aa
White text reads best on this color (9.89:1).
About this color
#2A4561 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.058 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.012 away. White text reads best on it, at 9.89:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.12:1 |
| White text | 9.89:1 |
Values
| HEX | #2A4561 |
| RGB | rgb(42, 69, 97) |
| HSL | hsl(211, 40%, 27%) |
| OKLCH | oklch(38.2% 0.058 250.4) |
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 #2A4561 | 9.89:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #2A4561 | 2.12:1 | Fails | Lc 11.1 | Not readable |
| #2A4561 text on white | 9.89:1 | AAA | Lc 92.9 | Preferred for body text |
| #2A4561 text on black | 2.12:1 | Fails | Lc -9.6 | 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
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE9
oklch(88.6% 0.024 250.1)
-
Step 300
300
#ACC3DD
oklch(80.8% 0.045 251.6)
-
Step 400
400
#80A4CB
oklch(70.6% 0.07 250.8)
-
Step 500
500
#5F8DBE
oklch(63% 0.09 250.9)
-
Step 600
600
#4477AA
oklch(55.6% 0.097 250)
-
Step 700
700
#366492
oklch(49.2% 0.09 250.1)
-
Step 800
800
#2D5177
oklch(42.6% 0.076 251.2)
-
Step 900
900 (this color)
#2A4561
oklch(38.2% 0.058 250.4)
-
Step 950
950
#182838
oklch(27.1% 0.037 249.3)
#2A4561 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) | #3A4662 | 0.022 |
| Deuteranopia (no green cones) | #324160 | 0.015 |
| Tritanopia (no blue cones) | #0A4B4F | 0.049 |
| Achromatopsia (no color) | #434343 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4561
#2A4561
oklch(38.2% 0.058 250.4)
- #573D1E
#573D1E
oklch(38.2% 0.058 69.4)
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 #2A4561, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.012
- Charcoal #264653 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.046
- Twilight Blue #0A437A ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.056
- Dark Teal #014D4E ΔE 0.056
Use #2A4561 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.