#2A4351
Closest named color: Charcoal (#264653). oklch(36.9% 0.039 233.8), rgb(42, 67, 81).
Aa
White text reads best on this color (10.39:1).
About this color
#2A4351 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.039 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.010 away. White text reads best on it, at 10.39:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.02:1 |
| White text | 10.39:1 |
Values
| HEX | #2A4351 |
| RGB | rgb(42, 67, 81) |
| HSL | hsl(202, 32%, 24%) |
| OKLCH | oklch(36.9% 0.039 233.8) |
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 #2A4351 | 10.39:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #2A4351 | 2.02:1 | Fails | Lc 9.9 | Not readable |
| #2A4351 text on white | 10.39:1 | AAA | Lc 94.1 | Preferred for body text |
| #2A4351 text on black | 2.02:1 | Fails | Lc -8.5 | 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
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#CFDBE2
oklch(88.4% 0.016 233)
-
Step 300
300
#AFC4D1
oklch(80.9% 0.029 234.9)
-
Step 400
400
#84A6BA
oklch(70.7% 0.047 234.1)
-
Step 500
500
#6590A8
oklch(63.1% 0.059 233.4)
-
Step 600
600
#4B7A94
oklch(55.6% 0.065 233.9)
-
Step 700
700
#3C677E
oklch(49.2% 0.06 233.2)
-
Step 800
800
#325466
oklch(42.8% 0.05 232.7)
-
Step 900
900 (this color)
#2A4351
oklch(36.9% 0.039 233.8)
-
Step 950
950
#1A2931
oklch(27.1% 0.025 232.2)
#2A4351 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) | #3C4252 | 0.025 |
| Deuteranopia (no green cones) | #373E51 | 0.023 |
| Tritanopia (no blue cones) | #1A4748 | 0.029 |
| Achromatopsia (no color) | #404040 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4351
#2A4351
oklch(36.9% 0.039 233.8)
- #503A2C
#503A2C
oklch(36.9% 0.039 53.6)
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 #2A4351, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.010
- Dark Grey Blue #29465B ΔE 0.017
- Dark Blue Grey #1F3B4D ΔE 0.031
- Charcoal Grey #3C4142 ΔE 0.033
- Onyx #343A40 ΔE 0.035
- Dark Slate Gray #2F4F4F ΔE 0.042
- Dark Teal #014D4E ΔE 0.043
- Midnight Green #073B4C ΔE 0.045
Use #2A4351 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.