#1F435F
Closest named color: Dark Grey Blue (#29465B). oklch(37% 0.064 244.3), rgb(31, 67, 95).
Aa
White text reads best on this color (10.36:1).
About this color
#1F435F is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.064 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.018 away. White text reads best on it, at 10.36:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.02:1 |
| White text | 10.36:1 |
Values
| HEX | #1F435F |
| RGB | rgb(31, 67, 95) |
| HSL | hsl(206, 51%, 25%) |
| OKLCH | oklch(37% 0.064 244.3) |
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 #1F435F | 10.36:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #1F435F | 2.02:1 | Fails | Lc 10.0 | Not readable |
| #1F435F text on white | 10.36:1 | AAA | Lc 93.9 | Preferred for body text |
| #1F435F text on black | 2.02:1 | Fails | Lc -8.7 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CBDCEA
oklch(88.6% 0.027 242.8)
-
Step 300
300
#A7C5DE
oklch(81% 0.048 243.5)
-
Step 400
400
#77A6CD
oklch(70.6% 0.076 244.2)
-
Step 500
500
#5290C0
oklch(63.2% 0.097 243.6)
-
Step 600
600
#3479AD
oklch(55.6% 0.106 244.3)
-
Step 700
700
#266695
oklch(49.2% 0.099 244.2)
-
Step 800
800
#215378
oklch(42.6% 0.081 243.9)
-
Step 900
900 (this color)
#1F435F
oklch(37% 0.064 244.3)
-
Step 950
950
#142839
oklch(26.9% 0.041 245.8)
#1F435F 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) | #374460 | 0.030 |
| Deuteranopia (no green cones) | #2E3D5E | 0.024 |
| Tritanopia (no blue cones) | #004A4D | 0.048 |
| Achromatopsia (no color) | #404040 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F435F
#1F435F
oklch(37% 0.064 244.3)
- #573818
#573818
oklch(37% 0.064 64.3)
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 #1F435F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.018
- Charcoal #264653 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.045
- Midnight Green #073B4C ΔE 0.046
- Twilight Blue #0A437A ΔE 0.048
- Marine Blue #01386A ΔE 0.050
- Dark Teal #014D4E ΔE 0.053
Use #1F435F 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.