#343A53
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.4% 0.044 273.6), rgb(52, 58, 83).
Aa
White text reads best on this color (11.19:1).
About this color
#343A53 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.044 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.032 away. White text reads best on it, at 11.19:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.87:1 |
| White text | 11.19:1 |
Values
| HEX | #343A53 |
| RGB | rgb(52, 58, 83) |
| HSL | hsl(228, 23%, 26%) |
| OKLCH | oklch(35.4% 0.044 273.6) |
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 #343A53 | 11.19:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #343A53 | 1.87:1 | Fails | Lc 8.0 | Not readable |
| #343A53 text on white | 11.19:1 | AAA | Lc 95.8 | Preferred for body text |
| #343A53 text on black | 1.87:1 | 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
#E8E9F0
oklch(93.5% 0.009 279.7)
-
Step 200
200
#D5D9E6
oklch(88.6% 0.018 272.3)
-
Step 300
300
#B9C0D7
oklch(81% 0.033 272.2)
-
Step 400
400
#969FC2
oklch(70.7% 0.052 273.7)
-
Step 500
500
#7C87B3
oklch(63.1% 0.068 273.5)
-
Step 600
600
#65709F
oklch(55.5% 0.074 273.6)
-
Step 700
700
#545E88
oklch(49.1% 0.069 273.4)
-
Step 800
800
#454D6E
oklch(42.7% 0.056 273.4)
-
Step 900
900 (this color)
#343A53
oklch(35.4% 0.044 273.6)
-
Step 950
950
#222634
oklch(27.1% 0.027 272.1)
#343A53 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) | #323C54 | 0.006 |
| Deuteranopia (no green cones) | #303A52 | 0.007 |
| Tritanopia (no blue cones) | #2B3F43 | 0.040 |
| Achromatopsia (no color) | #3B3B3B | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343A53
#343A53
oklch(35.4% 0.044 273.6)
- #433B1F
#433B1F
oklch(35.3% 0.045 93.9)
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 #343A53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.032
- Onyx #343A40 ΔE 0.034
- Dark Grey Blue #29465B ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.039
- Charcoal #264653 ΔE 0.041
- Gunmetal #293241 ΔE 0.042
- Charcoal Grey #3C4142 ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.050
Use #343A53 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.