#1F4161
Closest named color: Dark Grey Blue (#29465B). oklch(36.6% 0.068 248.9), rgb(31, 65, 97).
Aa
White text reads best on this color (10.56:1).
About this color
#1F4161 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.068 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.025 away. White text reads best on it, at 10.56:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.98:1 |
| White text | 10.56:1 |
Values
| HEX | #1F4161 |
| RGB | rgb(31, 65, 97) |
| HSL | hsl(209, 52%, 25%) |
| OKLCH | oklch(36.6% 0.068 248.9) |
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 #1F4161 | 10.56:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #1F4161 | 1.98:1 | Fails | Lc 9.6 | Not readable |
| #1F4161 text on white | 10.56:1 | AAA | Lc 94.3 | Preferred for body text |
| #1F4161 text on black | 1.98:1 | Fails | Lc -8.2 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A8C4E1
oklch(80.9% 0.051 249.4)
-
Step 400
400
#78A5D2
oklch(70.7% 0.082 249.1)
-
Step 500
500
#548EC6
oklch(63.1% 0.105 249)
-
Step 600
600
#3777B3
oklch(55.6% 0.114 249.3)
-
Step 700
700
#29649A
oklch(49.1% 0.106 249.2)
-
Step 800
800
#23527D
oklch(42.8% 0.088 248.9)
-
Step 900
900 (this color)
#1F4161
oklch(36.6% 0.068 248.9)
-
Step 950
950
#15283B
oklch(27.1% 0.044 249.7)
#1F4161 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) | #334262 | 0.025 |
| Deuteranopia (no green cones) | #2A3C60 | 0.018 |
| Tritanopia (no blue cones) | #00494C | 0.055 |
| Achromatopsia (no color) | #3F3F3F | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4161
#1F4161
oklch(36.6% 0.068 248.9)
- #563710
#563710
oklch(36.6% 0.069 68.3)
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 #1F4161, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.025
- Charcoal #264653 ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.040
- Marine Blue #01386A ΔE 0.043
- Twilight Blue #0A437A ΔE 0.043
- Midnight Green #073B4C ΔE 0.046
- Onyx #343A40 ΔE 0.059
Use #1F4161 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.