#2A3748
Closest named color: Dark Blue Grey (#1F3B4D). oklch(33.3% 0.035 255.3), rgb(42, 55, 72).
Aa
White text reads best on this color (12.07:1).
About this color
#2A3748 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.035 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.018 away. White text reads best on it, at 12.07:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.73:1 |
| White text | 12.07:1 |
Values
| HEX | #2A3748 |
| RGB | rgb(42, 55, 72) |
| HSL | hsl(214, 26%, 22%) |
| OKLCH | oklch(33.3% 0.035 255.3) |
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 #2A3748 | 12.07:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #2A3748 | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #2A3748 text on white | 12.07:1 | AAA | Lc 97.6 | Preferred for body text |
| #2A3748 text on black | 1.73:1 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D3DAE3
oklch(88.6% 0.015 254.6)
-
Step 300
300
#B6C2D2
oklch(81% 0.026 255.6)
-
Step 400
400
#90A2BB
oklch(70.7% 0.042 256.6)
-
Step 500
500
#748BAA
oklch(63% 0.054 256)
-
Step 600
600
#5C7595
oklch(55.5% 0.058 254.8)
-
Step 700
700
#4C627F
oklch(49% 0.054 255.5)
-
Step 800
800
#3E5067
oklch(42.6% 0.045 254.8)
-
Step 900
900 (this color)
#2A3748
oklch(33.3% 0.035 255.3)
-
Step 950
950
#1F2731
oklch(27% 0.022 254.2)
#2A3748 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) | #313849 | 0.012 |
| Deuteranopia (no green cones) | #2D3548 | 0.008 |
| Tritanopia (no blue cones) | #203B3D | 0.031 |
| Achromatopsia (no color) | #363636 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3748
#2A3748
oklch(33.3% 0.035 255.3)
- #413421
#413421
oklch(33.4% 0.036 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 #2A3748, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.018
- Gunmetal #293241 ΔE 0.018
- Onyx #343A40 ΔE 0.025
- Space Cadet #2B2D42 ΔE 0.032
- Midnight Green #073B4C ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.033
- Charcoal #264653 ΔE 0.048
- Charcoal Grey #3C4142 ΔE 0.049
Use #2A3748 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.