#1F415F
Closest named color: Dark Grey Blue (#29465B). oklch(36.5% 0.066 247.3), rgb(31, 65, 95).
Aa
White text reads best on this color (10.60:1).
About this color
#1F415F is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.066 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.023 away. White text reads best on it, at 10.60:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.97:1 |
| White text | 10.60:1 |
Values
| HEX | #1F415F |
| RGB | rgb(31, 65, 95) |
| HSL | hsl(208, 51%, 25%) |
| OKLCH | oklch(36.5% 0.066 247.3) |
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 #1F415F | 10.60:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #1F415F | 1.97:1 | Fails | Lc 9.5 | Not readable |
| #1F415F text on white | 10.60:1 | AAA | Lc 94.4 | Preferred for body text |
| #1F415F text on black | 1.97:1 | Fails | Lc -8.1 | 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 900.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CBDBEB
oklch(88.4% 0.028 248.1)
-
Step 300
300
#A8C4DF
oklch(80.8% 0.049 247.5)
-
Step 400
400
#79A5D0
oklch(70.6% 0.079 248.4)
-
Step 500
500
#548FC3
oklch(63.2% 0.1 246.8)
-
Step 600
600
#3778B0
oklch(55.6% 0.11 247.3)
-
Step 700
700
#296597
oklch(49.2% 0.101 247)
-
Step 800
800
#24527A
oklch(42.6% 0.084 247.5)
-
Step 900
900 (this color)
#1F415F
oklch(36.5% 0.066 247.3)
-
Step 950
950
#15283A
oklch(27% 0.042 248.4)
#1F415F 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) | #344260 | 0.026 |
| Deuteranopia (no green cones) | #2B3C5E | 0.019 |
| Tritanopia (no blue cones) | #00484C | 0.050 |
| Achromatopsia (no color) | #3F3F3F | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F415F
#1F415F
oklch(36.5% 0.066 247.3)
- #553713
#553713
oklch(36.5% 0.066 67.7)
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 #1F415F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.023
- Charcoal #264653 ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.039
- Midnight Green #073B4C ΔE 0.043
- Marine Blue #01386A ΔE 0.045
- Twilight Blue #0A437A ΔE 0.047
- Onyx #343A40 ΔE 0.056
Use #1F415F 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.