#1B4F67
Closest named color: Dark Grey Blue (#29465B). oklch(40.5% 0.067 232), rgb(27, 79, 103).
Aa
White text reads best on this color (8.89:1).
About this color
#1B4F67 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.067 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.031 away. White text reads best on it, at 8.89:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.36:1 |
| White text | 8.89:1 |
Values
| HEX | #1B4F67 |
| RGB | rgb(27, 79, 103) |
| HSL | hsl(199, 58%, 25%) |
| OKLCH | oklch(40.5% 0.067 232) |
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 #1B4F67 | 8.89:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #1B4F67 | 2.36:1 | Fails | Lc 13.8 | Not readable |
| #1B4F67 text on white | 8.89:1 | AAA | Lc 90.1 | Preferred for body text |
| #1B4F67 text on black | 2.36:1 | Fails | Lc -12.1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE5
oklch(88.5% 0.021 232.2)
-
Step 300
300
#A8C6D6
oklch(81% 0.039 231.2)
-
Step 400
400
#78A8C1
oklch(70.6% 0.063 231.5)
-
Step 500
500
#5392B2
oklch(63% 0.081 232.1)
-
Step 600
600
#357C9E
oklch(55.6% 0.088 232.2)
-
Step 700
700
#276887
oklch(49% 0.082 232.7)
-
Step 800
800 (this color)
#1B4F67
oklch(40.5% 0.067 232)
-
Step 900
900
#224659
oklch(37.6% 0.053 233.6)
-
Step 950
950
#152934
oklch(26.9% 0.033 233.9)
#1B4F67 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) | #434E68 | 0.045 |
| Deuteranopia (no green cones) | #394667 | 0.040 |
| Tritanopia (no blue cones) | #005557 | 0.041 |
| Achromatopsia (no color) | #4A4A4A | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4F67
#1B4F67
oklch(40.5% 0.067 232)
- #663E25
#663E25
oklch(40.6% 0.068 51.8)
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 #1B4F67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.031
- Deep Teal #00555A ΔE 0.036
- Charcoal #264653 ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.045
- Dark Teal #014D4E ΔE 0.047
- Light Navy #155084 ΔE 0.049
- Petrol #005F6A ΔE 0.050
Use #1B4F67 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.