#1F4B60
Closest named color: Dark Grey Blue (#29465B). oklch(39.2% 0.06 231.8), rgb(31, 75, 96).
Aa
White text reads best on this color (9.40:1).
About this color
#1F4B60 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.060 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.017 away. White text reads best on it, at 9.40:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.23:1 |
| White text | 9.40:1 |
Values
| HEX | #1F4B60 |
| RGB | rgb(31, 75, 96) |
| HSL | hsl(199, 51%, 25%) |
| OKLCH | oklch(39.2% 0.06 231.8) |
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 #1F4B60 | 9.40:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #1F4B60 | 2.23:1 | Fails | Lc 12.4 | Not readable |
| #1F4B60 text on white | 9.40:1 | AAA | Lc 91.5 | Preferred for body text |
| #1F4B60 text on black | 2.23:1 | Fails | Lc -10.8 | 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
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADCE7
oklch(88.4% 0.025 234.5)
-
Step 300
300
#A4C6D9
oklch(80.8% 0.045 232.5)
-
Step 400
400
#72A9C6
oklch(70.7% 0.072 232.1)
-
Step 500
500
#4993B7
oklch(63.1% 0.091 231.8)
-
Step 600
600
#257DA3
oklch(55.6% 0.099 231.5)
-
Step 700
700
#15698C
oklch(49% 0.093 232)
-
Step 800
800
#165672
oklch(42.8% 0.077 232)
-
Step 900
900 (this color)
#1F4B60
oklch(39.2% 0.06 231.8)
-
Step 950
950
#112A36
oklch(27.1% 0.038 231.3)
#1F4B60 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) | #414A61 | 0.041 |
| Deuteranopia (no green cones) | #384360 | 0.036 |
| Tritanopia (no blue cones) | #005152 | 0.040 |
| Achromatopsia (no color) | #464646 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4B60
#1F4B60
oklch(39.2% 0.06 231.8)
- #5F3C26
#5F3C26
oklch(39.2% 0.06 52.3)
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 #1F4B60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.017
- Charcoal #264653 ΔE 0.024
- Dark Slate Gray #2F4F4F ΔE 0.038
- Deep Teal #00555A ΔE 0.039
- Dark Teal #014D4E ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.055
- Dark Blue Green #005249 ΔE 0.055
- Charcoal Grey #3C4142 ΔE 0.057
Use #1F4B60 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.