#1B506E
Closest named color: Deep Sea Blue (#015482). oklch(41.1% 0.074 237.5), rgb(27, 80, 110).
Aa
White text reads best on this color (8.68:1).
About this color
#1B506E is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.074 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.033 away. White text reads best on it, at 8.68:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.41:1 |
| White text | 8.68:1 |
Values
| HEX | #1B506E |
| RGB | rgb(27, 80, 110) |
| HSL | hsl(202, 61%, 27%) |
| OKLCH | oklch(41.1% 0.074 237.5) |
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 #1B506E | 8.68:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #1B506E | 2.41:1 | Fails | Lc 14.5 | Not readable |
| #1B506E text on white | 8.68:1 | AAA | Lc 89.5 | Fine for body text |
| #1B506E text on black | 2.41:1 | Fails | Lc -12.7 | 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 800.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A7C5DA
oklch(80.8% 0.044 238.6)
-
Step 400
400
#77A7C7
oklch(70.6% 0.07 238.2)
-
Step 500
500
#5191B9
oklch(63% 0.089 237.9)
-
Step 600
600
#327BA5
oklch(55.6% 0.097 237.5)
-
Step 700
700
#24678D
oklch(49% 0.09 237.7)
-
Step 800
800 (this color)
#1B506E
oklch(41.1% 0.074 237.5)
-
Step 900
900
#20465D
oklch(37.7% 0.059 237.6)
-
Step 950
950
#142936
oklch(27% 0.036 237.4)
#1B506E 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) | #42506F | 0.043 |
| Deuteranopia (no green cones) | #36486D | 0.034 |
| Tritanopia (no blue cones) | #00585A | 0.050 |
| Achromatopsia (no color) | #4B4B4B | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B506E
#1B506E
oklch(41.1% 0.074 237.5)
- #693F1E
#693F1E
oklch(41.1% 0.075 56.7)
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 #1B506E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.033
- Light Navy #155084 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.039
- Deep Teal #00555A ΔE 0.045
- Charcoal #264653 ΔE 0.048
- Petrol #005F6A ΔE 0.050
- Twilight Blue #0A437A ΔE 0.051
- Dark Slate Gray #2F4F4F ΔE 0.053
Use #1B506E 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.