#434D63
Closest named color: YInMn Blue (#415A77). oklch(42% 0.039 265.7), rgb(67, 77, 99).
Aa
White text reads best on this color (8.46:1).
About this color
#434D63 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.039 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.044 away. White text reads best on it, at 8.46:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.48:1 |
| White text | 8.46:1 |
Values
| HEX | #434D63 |
| RGB | rgb(67, 77, 99) |
| HSL | hsl(221, 19%, 33%) |
| OKLCH | oklch(42% 0.039 265.7) |
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 #434D63 | 8.46:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #434D63 | 2.48:1 | Fails | Lc 14.8 | Not readable |
| #434D63 text on white | 8.46:1 | AAA | Lc 89.2 | Fine for body text |
| #434D63 text on black | 2.48:1 | Fails | Lc -13.1 | 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 800.
-
Step 50
50
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D5D9E2
oklch(88.5% 0.013 266.7)
-
Step 300
300
#BAC1D0
oklch(81% 0.022 265.7)
-
Step 400
400
#96A1B8
oklch(70.8% 0.036 265.1)
-
Step 500
500
#7C89A6
oklch(63% 0.046 266.1)
-
Step 600
600
#657392
oklch(55.6% 0.051 265.8)
-
Step 700
700
#54607C
oklch(49% 0.048 266.6)
-
Step 800
800 (this color)
#434D63
oklch(42% 0.039 265.7)
-
Step 900
900
#3A4152
oklch(37.6% 0.031 267.4)
-
Step 950
950
#222630
oklch(26.9% 0.02 267.9)
#434D63 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) | #464E64 | 0.006 |
| Deuteranopia (no green cones) | #434C62 | 0.003 |
| Tritanopia (no blue cones) | #3A5154 | 0.035 |
| Achromatopsia (no color) | #4D4D4D | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434D63
#434D63
oklch(42% 0.039 265.7)
- #574C34
#574C34
oklch(42.1% 0.04 86.1)
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 #434D63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.047
- Dusty Grape #545775 ΔE 0.048
- Charcoal #264653 ΔE 0.053
- Dusk #4E5481 ΔE 0.054
- Charcoal Grey #3C4142 ΔE 0.061
- Deep Teal #00555A ΔE 0.064
Use #434D63 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.