#1B645D
Closest named color: Dark Green Blue (#1F6357). oklch(45.8% 0.071 185.8), rgb(27, 100, 93).
Aa
White text reads best on this color (6.93:1).
About this color
#1B645D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 46%, its chroma 0.071 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.009 away. White text reads best on it, at 6.93:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.02:1 |
| White text | 6.93:1 |
Values
| HEX | #1B645D |
| RGB | rgb(27, 100, 93) |
| HSL | hsl(174, 57%, 25%) |
| OKLCH | oklch(45.8% 0.071 185.8) |
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 #1B645D | 6.93:1 | AA | Lc -88.7 | Fine for body text |
| Black text on #1B645D | 3.02:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #1B645D text on white | 6.93:1 | AA | Lc 83.7 | Fine for body text |
| #1B645D text on black | 3.02:1 | AA large text | Lc -18.3 | Dividers and decoration only |
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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2EDEB
oklch(93.7% 0.012 184.1)
-
Step 200
200
#C9DEDB
oklch(88.4% 0.023 186.4)
-
Step 300
300
#A4CAC4
oklch(81% 0.041 184.7)
-
Step 400
400
#6FAEA6
oklch(70.6% 0.066 185.7)
-
Step 500
500
#449A91
oklch(63.1% 0.084 186.1)
-
Step 600
600
#19847B
oklch(55.5% 0.091 186.1)
-
Step 700
700
#047068
oklch(49.1% 0.085 186.2)
-
Step 800
800 (this color)
#1B645D
oklch(45.8% 0.071 185.8)
-
Step 900
900
#174B46
oklch(37.7% 0.055 186.2)
-
Step 950
950
#102C29
oklch(27% 0.034 186.1)
#1B645D 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) | #5F5E5D | 0.076 |
| Deuteranopia (no green cones) | #54565E | 0.072 |
| Tritanopia (no blue cones) | #006662 | 0.011 |
| Achromatopsia (no color) | #5A5A5A | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B645D
#1B645D
oklch(45.8% 0.071 185.8)
- #794651
#794651
oklch(45.8% 0.071 6.3)
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 #1B645D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.009
- Dark Aqua #05696B ΔE 0.023
- Petrol #005F6A ΔE 0.032
- Dark Aquamarine #017371 ΔE 0.048
- Deep Turquoise #017374 ΔE 0.050
- Deep Teal #00555A ΔE 0.052
- Spruce #0A5F38 ΔE 0.059
- Pine #2B5D34 ΔE 0.059
Use #1B645D 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.