#1B505D
Closest named color: Deep Teal (#00555A). oklch(40.2% 0.059 217), rgb(27, 80, 93).
Aa
White text reads best on this color (8.92:1).
About this color
#1B505D is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.059 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.021 away. White text reads best on it, at 8.92:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.35:1 |
| White text | 8.92:1 |
Values
| HEX | #1B505D |
| RGB | rgb(27, 80, 93) |
| HSL | hsl(192, 55%, 24%) |
| OKLCH | oklch(40.2% 0.059 217) |
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 #1B505D | 8.92:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #1B505D | 2.35:1 | Fails | Lc 13.7 | Not readable |
| #1B505D text on white | 8.92:1 | AAA | Lc 90.2 | Preferred for body text |
| #1B505D text on black | 2.35:1 | Fails | Lc -12.0 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECEE
oklch(93.7% 0.01 212.5)
-
Step 200
200
#CCDDE1
oklch(88.6% 0.019 213.4)
-
Step 300
300
#A9C7CF
oklch(81% 0.034 215.6)
-
Step 400
400
#79AAB7
oklch(70.8% 0.055 216)
-
Step 500
500
#5494A5
oklch(63% 0.07 216.9)
-
Step 600
600
#367E91
oklch(55.5% 0.077 217.9)
-
Step 700
700
#286B7B
oklch(49.2% 0.071 216.4)
-
Step 800
800 (this color)
#1B505D
oklch(40.2% 0.059 217)
-
Step 900
900
#224851
oklch(37.8% 0.046 215.1)
-
Step 950
950
#152A30
oklch(27% 0.029 218.2)
#1B505D 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) | #474D5E | 0.051 |
| Deuteranopia (no green cones) | #3E475D | 0.045 |
| Tritanopia (no blue cones) | #005554 | 0.029 |
| Achromatopsia (no color) | #4A4A4A | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B505D
#1B505D
oklch(40.2% 0.059 217)
- #643D31
#643D31
oklch(40.3% 0.059 37.9)
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 #1B505D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.021
- Dark Slate Gray #2F4F4F ΔE 0.027
- Dark Teal #014D4E ΔE 0.031
- Charcoal #264653 ΔE 0.032
- Dark Grey Blue #29465B ΔE 0.032
- Dark Blue Green #005249 ΔE 0.041
- Petrol #005F6A ΔE 0.047
- Charcoal Grey #3C4142 ΔE 0.061
Use #1B505D 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.