#137EA5
Closest named color: Nice Blue (#107AB0). oklch(55.6% 0.106 229.8), rgb(19, 126, 165).
Aa
White text reads best on this color (4.60:1).
About this color
#137EA5 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.106 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.023 away. White text reads best on it, at 4.60:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.55:1 |
| White text | 4.60:1 |
Values
| HEX | #137EA5 |
| RGB | rgb(19, 126, 165) |
| HSL | hsl(196, 79%, 36%) |
| OKLCH | oklch(55.6% 0.106 229.8) |
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 #137EA5 | 4.60:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #137EA5 | 4.55:1 | AA | Lc 32.5 | Non-text elements, placeholder text |
| #137EA5 text on white | 4.60:1 | AA | Lc 71.5 | Content text, not long reading |
| #137EA5 text on black | 4.55:1 | AA | Lc -30.1 | Non-text elements, placeholder text |
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
#C8DDE7
oklch(88.5% 0.026 227.9)
-
Step 300
300
#A2C7DA
oklch(80.9% 0.048 230.4)
-
Step 400
400
#6DAAC7
oklch(70.7% 0.076 229.7)
-
Step 500
500
#4094B9
oklch(63.1% 0.098 230.1)
-
Step 600
600 (this color)
#137EA5
oklch(55.6% 0.106 229.8)
-
Step 700
700
#006A8D
oklch(49.1% 0.098 229.8)
-
Step 800
800
#095773
oklch(42.8% 0.082 229.6)
-
Step 900
900
#15485D
oklch(37.8% 0.064 229.5)
-
Step 950
950
#0E2A36
oklch(27% 0.04 229.1)
#137EA5 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) | #6A7CA7 | 0.073 |
| Deuteranopia (no green cones) | #576FA4 | 0.062 |
| Tritanopia (no blue cones) | #00898B | 0.061 |
| Achromatopsia (no color) | #757575 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #137EA5
#137EA5
oklch(55.6% 0.106 229.8)
- #A45F36
#A45F36
oklch(55.6% 0.106 49.9)
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 #137EA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.023
- Cerulean #457B9D ΔE 0.031
- Ocean #017B92 ΔE 0.031
- Teal Blue #01889F ΔE 0.034
- Sea Blue #047495 ΔE 0.036
- Blue NCS #118AB2 ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.038
- Dull Blue #49759C ΔE 0.039
Use #137EA5 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.