#2A4358
Closest named color: Dark Grey Blue (#29465B). oklch(37.2% 0.048 244.9), rgb(42, 67, 88).
Aa
White text reads best on this color (10.28:1).
About this color
#2A4358 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.048 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.010 away. White text reads best on it, at 10.28:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.04:1 |
| White text | 10.28:1 |
Values
| HEX | #2A4358 |
| RGB | rgb(42, 67, 88) |
| HSL | hsl(207, 35%, 25%) |
| OKLCH | oklch(37.2% 0.048 244.9) |
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 #2A4358 | 10.28:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #2A4358 | 2.04:1 | Fails | Lc 10.1 | Not readable |
| #2A4358 text on white | 10.28:1 | AAA | Lc 93.8 | Preferred for body text |
| #2A4358 text on black | 2.04:1 | Fails | Lc -8.7 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CFDBE6
oklch(88.6% 0.02 245.7)
-
Step 300
300
#AEC4D7
oklch(81% 0.036 244.3)
-
Step 400
400
#83A5C2
oklch(70.7% 0.057 244.5)
-
Step 500
500
#638EB3
oklch(63% 0.073 245.3)
-
Step 600
600
#49789F
oklch(55.6% 0.08 245)
-
Step 700
700
#3A6588
oklch(49.1% 0.074 244.7)
-
Step 800
800
#31526E
oklch(42.6% 0.061 245.5)
-
Step 900
900 (this color)
#2A4358
oklch(37.2% 0.048 244.9)
-
Step 950
950
#1A2834
oklch(27% 0.03 245.1)
#2A4358 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) | #3A4359 | 0.022 |
| Deuteranopia (no green cones) | #343E58 | 0.020 |
| Tritanopia (no blue cones) | #15484A | 0.040 |
| Achromatopsia (no color) | #414141 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4358
#2A4358
oklch(37.2% 0.048 244.9)
- #523B25
#523B25
oklch(37.2% 0.047 64.3)
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 #2A4358, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.010
- Charcoal #264653 ΔE 0.016
- Dark Blue Grey #1F3B4D ΔE 0.034
- Charcoal Grey #3C4142 ΔE 0.042
- Onyx #343A40 ΔE 0.044
- Midnight Green #073B4C ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.048
- Dark Teal #014D4E ΔE 0.049
Use #2A4358 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.