#137D9E
Closest named color: Ocean (#017B92). oklch(55% 0.1 225.7), rgb(19, 125, 158).
Aa
White text reads best on this color (4.71:1).
About this color
#137D9E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.100 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.020 away. White text reads best on it, at 4.71:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.45:1 |
| White text | 4.71:1 |
Values
| HEX | #137D9E |
| RGB | rgb(19, 125, 158) |
| HSL | hsl(194, 79%, 35%) |
| OKLCH | oklch(55% 0.1 225.7) |
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 #137D9E | 4.71:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #137D9E | 4.45:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #137D9E text on white | 4.71:1 | AA | Lc 72.3 | Content text, not long reading |
| #137D9E text on black | 4.45:1 | AA large text | Lc -29.4 | 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 600.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A2C7D7
oklch(80.8% 0.045 226)
-
Step 400
400
#6EAAC3
oklch(70.6% 0.072 226.3)
-
Step 500
500
#4295B4
oklch(63.1% 0.092 225.7)
-
Step 600
600 (this color)
#137D9E
oklch(55% 0.1 225.7)
-
Step 700
700
#016B89
oklch(49.2% 0.094 225.8)
-
Step 800
800
#0C576F
oklch(42.7% 0.077 226)
-
Step 900
900
#16485A
oklch(37.7% 0.06 225.9)
-
Step 950
950
#0F2A35
oklch(27% 0.038 227.5)
#137D9E 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) | #6B7AA0 | 0.076 |
| Deuteranopia (no green cones) | #596E9E | 0.065 |
| Tritanopia (no blue cones) | #008788 | 0.053 |
| Achromatopsia (no color) | #737373 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #137D9E
#137D9E
oklch(55% 0.1 225.7)
- #A15D3D
#A15D3D
oklch(54.9% 0.1 45.3)
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 #137D9E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.020
- Sea Blue #047495 ΔE 0.029
- Cerulean #457B9D ΔE 0.031
- Nice Blue #107AB0 ΔE 0.032
- Teal Blue #01889F ΔE 0.033
- Ocean Blue #03719C ΔE 0.037
- Dull Blue #49759C ΔE 0.039
- Muted Blue #3B719F ΔE 0.040
Use #137D9E 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.