#2A374D
Closest named color: Dark Blue Grey (#1F3B4D). oklch(33.5% 0.043 260.7), rgb(42, 55, 77).
Aa
White text reads best on this color (11.98:1).
About this color
#2A374D is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.043 and its hue 261°. 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 11.98:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.75:1 |
| White text | 11.98:1 |
Values
| HEX | #2A374D |
| RGB | rgb(42, 55, 77) |
| HSL | hsl(218, 29%, 23%) |
| OKLCH | oklch(33.5% 0.043 260.7) |
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 #2A374D | 11.98:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #2A374D | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #2A374D text on white | 11.98:1 | AAA | Lc 97.4 | Preferred for body text |
| #2A374D text on black | 1.75:1 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE5
oklch(88.6% 0.017 256.3)
-
Step 300
300
#B5C1D6
oklch(80.8% 0.032 261.7)
-
Step 400
400
#8FA2C1
oklch(70.8% 0.05 260.2)
-
Step 500
500
#738AB2
oklch(63.1% 0.066 261.3)
-
Step 600
600
#5B749D
oklch(55.6% 0.071 260.1)
-
Step 700
700
#4B6187
oklch(49.1% 0.067 261)
-
Step 800
800
#3E4F6D
oklch(42.6% 0.055 261.5)
-
Step 900
900 (this color)
#2A374D
oklch(33.5% 0.043 260.7)
-
Step 950
950
#1F2734
oklch(27.1% 0.027 260)
#2A374D 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) | #2F384E | 0.009 |
| Deuteranopia (no green cones) | #2B354D | 0.007 |
| Tritanopia (no blue cones) | #1E3C3F | 0.038 |
| Achromatopsia (no color) | #373737 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A374D
#2A374D
oklch(33.5% 0.043 260.7)
- #42341C
#42341C
oklch(33.4% 0.043 80)
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 #2A374D, 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 0.024
- Prussian Blue #1D3557 ΔE 0.026
- Onyx #343A40 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.034
- Midnight Green #073B4C ΔE 0.035
- Charcoal #264653 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.049
Use #2A374D 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.